Screw cap system

Abstract

The present invention provides a screw cap system comprising a screw cap (1) for closure of a threaded opening (4) in a container (17) and a time temperature indicator system, wherein the time temperature indicator system comprises at least one first section (2) comprising a first composition (9) and at least one second section (3) comprising a second composition (10); the first composition and the second composition providing a time and temperature dependent visual change in appearance when brought into contact witheach other; the first and second composition initially being separated; and the time temperature indicator (TTI) system is activated by moving the screw cap (1), wherein the first and the second composition comes into contact with each other during said movement.

Description

Field of the invention The present invention concerns time temperature indicator systems for monitoring the time and temperature exposure of foods, nutraceuticals, pharmaceuticals, chemicals and similar products. More particularly, the present invention provides a 5 screw cap system featuring a time temperature indicator system. Background of the invention Many products, particularly in the food and pharmaceutical industries, degrade, decay or perish over a finite lifetime. The rate at which such products degrade may depend on the environmental conditions. Accordingly, such products are often 10 inserted into a container under controlled environmental conditions and the container is sealed to isolate the products from an environment external to the container and thereby keep the products fresher for longer. On opening such a container for the first time, the products contained within are exposed to the external environment and degradation of the products typically accelerates relative 15 to a rate of degradation of the products when in the sealed container. Further, the rate of degradation commonly depends on the surrounding temperature. Accordingly, it is conventional to specify both a shelf life for products contained in a sealed container prior to opening the container and a period within which the products should be used after first opening the container. 20 A problem with storing products in containers in this way is that, without recording the time of first opening a specific container, it is difficult to determine to what extent the products contained within the container have degraded and, in particular, whether the period within which the products should have been used after first 25 opening the container has expired. In the case of food or pharmaceutical products, consumption of such products after expiry of the period within which the products should have been used after first opening the container may represent a health risk. Various solutions to this problem exist. For instance, US 9235194 B2 discloses a time indicator activated by opening a sealed container. 30 The goal of the present invention is to provide an improved screw cap system for a container. The screw cap system features a threshold indicator or a time indicator, preferably a time temperature indicator, activated in the process of opening a container for the first time. 35 Summary of the invention The present invention is defined in the attached claims, and in the following: 5 In a first aspect, the present invention provides a screw cap system comprising a screw cap for closure of a threaded opening in a container and a time temperature indicator system, wherein - the time temperature indicator system comprises at least one first section comprising a first composition and at least one second section comprising 10 a second composition; the first composition and the second composition providing a time and temperature dependent visual change in appearance when brought into contact with each other; the first and second composition initially being separated; and 15 the time temperature indicator (TTI) system is activated by moving the screw cap, wherein the first and the second composition comes into contact with each other during said movement. The screw cap comprises a closed top, an open end and an internal threading for 20 interaction with a threaded opening in a container. In one embodiment of the screw cap system, the at least one first section is moved relative to the at least one second section when the screw cap is moved to activate the TTI. 25 In one embodiment of the screw cap system, the at least one first section or the at least one second section may be moved between a first position and a second position, in the first position the first and the second compositions are separate and in the second position the first and the second composition are in contact. 30 In one embodiment of the screw cap system, the at least one first section is arranged at a first surface and the at least one second section is arranged at a second surface facing the first surface. 35 The first and the second surface are in contact after the TTI system is activated. Before activation, the first and the second surface may be separate or in contact depending on the mode of activation. In one embodiment of the screw cap system, the first and the second surface are arranged to rotate relative to each other between the first and the second position when the screw cap is twisted. 5 In one embodiment of the screw cap system the screw cap comprises an inner cap element and an outer cap element, and the inner cap element is moved relative to the outer cap element when the time temperature indicator (TTI) system is activated by moving the screw cap. 10 In one embodiment of the screw cap system, the first and the second surface are arranged to move relative to each other between the first and the second position when the outer cap element is pushed towards the inner cap element. In one embodiment of the screw cap system, the first and the second surface are 15 arranged to move relative to each other between the first and the second position when the inner cap element is pulled towards the outer cap element. In one embodiment of the screw cap system the inner cap element comprises the first surface and the outer cap element comprises the second surface. 20 In one embodiment of the screw cap system, the first and the second surface are arranged to rotate relative to each other between the first and the second position when the outer cap element is twisted. 25 In one embodiment, the screw cap system comprises a threaded opening featuring a collar arrangeable on a container. In one embodiment of the screw cap system, the collar comprises the first surface, or the first surface is on a container on which the collar may be arranged, and the 30 second surface is arranged on a ring element releasably connected to the screw cap, such that the second surface is rotated relative the first surface and the ring element released from the screw cap when the screw cap is twisted during opening. In one embodiment of the screw cap system, at least one of the first section and the 35 second section comprises a transparent material, such that the visual change in appearance is visible on an external surface of the screw cap system, preferably the second surface is part of a transparent section. In one embodiment of the screw cap system, the first section comprises a 40 recess / pocket in the first surface and the second section comprises a recess / pocket in the second surface. In one embodiment, the screw cap system comprises a seal-breaking element arranged to break a sealing between the at least one first section and the at least one second section when the first section and the second section are moved between the 5 first position and the second position. In one embodiment, the screw cap system comprises a seal-breaking element arranged to break a sealing between the at least one first section and the at least one second section, wherein the seal-breaking element is an arm / tab arranged on a 10 releasable ring, the ring connected to a lower edge of the screw cap, such that the ring is released from the lower edge when the screw cap and the releasable ring are twisted beyond a desired range. In one embodiment of the screw cap system, the at least one first section and the at 15 least one second section is arranged on a collar comprising a threaded opening, or on the surface of a container on which the screw cap system is arranged, the at least one first section and the at least one second section arranged such that the sealing is broken when the arm / tab is moved over at least parts of the first or second section when the screw cap is twisted. 20 In one embodiment of the screw cap system, the collar comprises a lower channel element comprising the at least one first section and a cooperating upper channel element comprising the at least one second section, at least parts of the upper channel element is transparent and may rotate relative the lower channel element. 25 In one embodiment of the screw cap system, the upper channel element is releasably connected to the screw cap, such that the upper channel element is rotated relative the lower channel element and released from the screw cap when the screw cap is twisted during opening. 30 In one embodiment of the screw cap system, the collar is arrangeable at a container opening. In one embodiment of the screw cap system, the first composition is a liquid or gel 35 composition, and the second composition is a dry composition. In one embodiment of the screw cap system the first composition is a liquid composition and the second composition is distributed in a longitudinal element made in a material through which the liquid composition may migrate in a time 40 temperature dependent manner, and wherein the first composition and one end of the longitudinal element comes into contact with each other when the time temperature indicator (TTI) system is activated by moving the screw cap. In a second aspect, the present invention provides a screw cap system comprising a 5 screw cap for closure of a threaded opening in a container and a time temperature indicator system, wherein - the time temperature indicator system comprises at least one first section having a coloured liquid composition and at least one second section comprising a longitudinal element made in a material through which the 10 coloured liquid composition may migrate in a time-dependent manner; the first and second section initially being separated; and the time temperature indicator (TTI) system is activated by moving the screw cap, such that the colored liquid composition and one end of the longitudinal 15 element comes into contact with each other. In one embodiment of the second aspect, the at least one first section is moved relative to the at least one second section when the screw cap is moved to activate the TTI. 20 In one embodiment of the second aspect, the at least one first section or the at least one second section may be moved between a first position and a second position, in the first position the first and the second composition are separate and in the second position the first and the second composition are in contact. 25 In all embodiments, the screw cap system may comprise at least one seal for separating the first and second composition and / or separating the at least one first section and the at least one second section, and / or for preventing drying of a liquid / gel composition. 30 All embodiments may comprise any suitable seal-breaking element for breaking a seal arranged to separate the first composition from the second composition. Such seal breaking elements include spikes, tabs, arms, scrapes etc. In all embodiments, the screw cap system may further include any advantageous ratchet rings, tabs and recesses for achieving a desired sequence of TTI system 35 activation and / or opening / closure of the screw cap system. Brief description of drawings The present invention is described in detail by reference to the following drawings: Figs. 1a-d are cross-sectional schematic drawings of a first embodiment of a screw cap system according to the invention. Figs. 2a-d are cross-sectional schematic drawings of a second embodiment of a screw cap system according to the invention. 5 Figs. 3a-d are cross-sectional schematic drawings of a third embodiment of a screw cap system according to the invention. Figs. 4a-d are cross-sectional schematic drawings of a fourth embodiment of a screw cap system according to the invention. Figs. 5a-c are schematic drawings of a fifth embodiment of a screw cap system 10 according to the invention. Figs. 6a-c are schematic drawings of a sixth embodiment of a screw cap system according to the invention. Figs. 7a-b are schematic drawings of a seventh embodiment of a screw cap system according to the invention. 15 Figs. 8a-c are schematic drawings of an eight embodiment of a screw cap system according to the invention. Figs. 9a-b are schematic drawings of a ninth embodiment of a screw cap system according to the invention. Figs. 10a-b illustrate a tenth embodiment of a screw cap system according to the 20 invention. Fig. 11 show details of different solutions suitable for the embodiment in figs. 10a-b. Fig. 12 show details of a screw cap system suitable for use with the embodiment in figs. 10a-b. 25 Fig. 13 show various screw cap arrangements suitable for the present invention. Fig. 14 show various connection arrangements between cap elements of a screw cap system according to the invention. Fig. 15 show various graphic designs of the visual change obtained by a time temperature indicator on a screw cap system according to the invention. 30 Detailed description of the invention The screw cap system according to the invention is described in detail by reference to the embodiments illustrated in figs. 1-15. All embodiments of the present invention comprise a time temperature dependent 5 indicator system. In the below description, the time or time temperature indicator system is generally disclosed as comprising a first composition and a second composition. The first and the second composition provides a time temperature dependent visual change when they are in contact. The visual change is commonly a change in colour or the removal of a colour to reveal a graphical symbol and 10 similar. In some embodiments, the first composition is a liquid or gel solvent and the second composition is a dry formulation that activates, i.e. provides a time temperature dependent visual change, when moisten by the liquid / gel solvent. Time temperature indicator systems are commonly based on two different principles: 15 1. The first composition is a liquid composition allowed to migrate in a time temperature dependent manner through a longitudinal element. In the simplest case, the first composition may be a colored liquid, and the indicator is based on the visual change provided by the liquid front of the first composition as it migrates. Alternatively, the visual change is caused by 20 first composition interacting with a second composition arranged in the longitudinal element, for instance the first composition has a certain pH-value and the second composition is a pH-indicator providing a visual change when the pH is changed by interaction with the first composition. See the disclosure of US 9235194 B2 for compositions suitable for use in the 25 first principle. A particularly advantageous indicator system for use in the present application is disclosed in WO 2012 / 141594. The disclosed TTI system comprises a first and a second compartment (i.e. a first section and a second section) initially being separated for preventing contact between them. The system is activated by bringing said two compartments into 30 contact and allow a liquid composition comprising a mutarotational reducing agent (i.e. a first composition) accommodated in the first compartment to migrate in a time temperature dependent manner through the second compartment. The second compartment contains an agent (i.e. a second composition) that changes visual appearance upon reduction. The 35 mutarotational reducing agent will then reduce the agent that changes visual appearance upon reduction in a time temperature dependent manner. Thus, the time temperature sensitivity of the system is the result of a combination of two time temperature dependent processes. The TTI systems according to the first principle, for instance as disclosed in WO 2012 / 141594, is in particular suitable for the below-described embodiments in figs. 5-8. 2. The first composition is a liquid / gel composition and the second composition is a dried composition, which is inactive until moistened / wetted by the first 5 composition, or a liquid / gel composition, which is inactive until interaction with the first composition. In this principle, the first composition and / or the second composition is accommodated in multiple separate sections having different concentrations of active agent(s). The rate of visual change is dependent on the concentration(s) of active agent and the multiple separate 10 sections provides a time temperature dependent visual change. Alternatively, the first composition in the multiple separate sections has an equal concentration of active agent(s), but are separated from the second composition by a barrier film through which one of the compositions may diffuse over a time period depending on the thickness of the barrier film. The 15 thickness of the barrier film is different for each separate section, such that a time temperature dependent indicator is obtained. A particularly advantageous indicator system is disclosed in patent application PCT / EP2016 / 081578 (claiming priority of Norwegian patent application no. 20151745). In PCT / EP2016 / 081578, one of the first or 20 second composition is a dried composition and the other is a liquid / gel composition. The dried composition may be obtained by for instance printing a liquid, in which the composition is dissolved, onto a substrate (i.e. for instance printed onto a first or second section) and dried. The dried composition is not active, i.e. does not provide a time temperature dependent 25 visual change. The concentration of an active agent in the dried composition may be varied. In the present invention, the time temperature indicator may for instance comprise multiple first sections and multiple second sections, wherein each first section comprises a dried composition with a different concentration of an active agent (i.e. a compound(s) contributing to a time 30 temperature dependent visual change when moistened / wetted by a solvent / gel composition) and each second section comprises a liquid / gel composition for wetting of the dried composition. The TTI systems according to the second principle, for instance as disclosed in PCT / EP2016 / 081578, are in particular suitable for the below-described 35 embodiments in figs. 1-4 and 9-11. It is noted that based on the present disclosure the skilled person would know of numerous time temperature indicator systems, and corresponding reactants / compositions, suitable for use in the present screw cap system. A first embodiment of a screw cap system according to the invention is shown in figs. 1a-d. The screw cap system comprises a screw cap 1 for closure of the threaded opening 4. The threaded opening features a collar 15, which may be connected to a container 17 (see for instance fig. 11a) for instance by gluing. The 5 screw cap system features a time temperature indicator (TTI) system comprising multiple first sections 2,2’ and multiple second section 3,3’. In figs. 1a-1d only two first sections and two second sections are shown for illustrative purposes. However, the screw cap system will commonly feature more than two of each section to provide a better indicator resolution. The first and second sections are arranged such 10 that the first section 2 and the cooperating second section 3 is separated when the time temperature indicator system is inactive, see fig. 1b, and in close contact when activated, see fig. 1d, by twisting the screw cap. Each of the first sections features a first composition 9, and each of the second sections comprises a second composition 10. In this particular embodiment the first composition is a wet gel and 15 the second composition is dry. The second composition 10 in one of the two second sections 3 comprises an active agent in a concentration different from the concentration present in the second composition in the other second section 3’. When the first sections and the second sections are brought into contact, the rate of the time temperature dependent visual change will be different in the two second 20 sections, and a time temperature dependent indicator is obtained. As discussed, the second composition is a dry composition. Such compositions may be obtained by for instance printing a liquid in which the second composition is dissolved. This may be done, for instance as disclosed in PCT / EP2016 / 081578. The outer cap element 7, or at least a top section of the outer cap element, is in a 25 transparent material such that the time and temperature dependent visual change of the second composition is detectable on an external surface of the screw cap system. An inner surface 8 (i.e. second surface) of the outer cap element lies entirely flat with a top surface of the inner cap element 5 providing a surface to surface contact. The inner surface of the outer cap element comprises pockets / recesses 24 for the 30 second composition 10. The top surface 6 (i.e. first surface) of the inner cap element 5 comprises pockets / recesses 25 for the first composition 9. The inner cap element and the outer cap element is connected by a one-way snap-fit connection 26, comprising cooperating snap flanges on the inner and the outer cap element, providing a rotational seal between the two cap elements. The snap-fit connection 35 locks the outer cap element to the inner cap element and maintains a seal surface pressure between the inner surface 8 and the top surface 6. Preferably, the interaction of the two facing surfaces is sufficient by itself to prevent any migration of compositions between the first and the second sections. However, suitable sealing means, e.g. lip seal(s) around the first or second sections, 40 wipe seal or similar, may be arranged to ensure total separation between the first and second sections (or first and second compositions) in the non-activated state. The sealing between the two surfaces may also be enhanced by selection of hard vs soft materials, for instance having the outer cap element made in a harder material than the inner cap element. 5 When arranged on a container, the screw cap 1 of the screw cap system is initially fully screwed onto the threaded opening 4 before the container is opened for the first time, i.e. the TTI system is in a non-activated position (or first position). In the non-activated position, the first sections 2,2’ are not aligned with the corresponding second sections 3,3’. During opening, the outer cap element is initially rotated 10 relative to the inner cap element. The outer cap element is commonly connected to the threaded opening 4 or collar 15 via a breakable tab / pin, burst ring or similar (not shown) for preventing the outer cap element from rotating prematurely, i.e. . When the outer cap element has been rotated such that the first sections 2,2’ are aligned with the corresponding second sections 3,3’ (i.e. reached a second position), the 15 outer cap element is locked into place, for instance by a suitably arranged tab(s) / recess(es), preventing further relative movement between the outer and the inner cap element. The first and second compositions 9,10 are now in contact and the TTI system is activated. Continued rotation of the outer cap element will move the inner and outer cap element relative to the threaded opening 4 and the screw cap 20 is screwed off the threaded opening. In a subsequent reattachment of the screw cap onto the threaded opening the inner cap element and the outer cap element are stationary relative to each other and the TTI system kept in the activated position. The size of the first and second sections 2,3 may be varied. For instance, the size may be shortened, thus shorten the degrees of rotation needed to activate the TTI 25 system. The rotation of the cap (in this embodiment the rotation of the outer cap element) can activate multiple individual pairs of first and second sections. The rotation of the screw cap / a color change / hiding or revealing a symbol can be used as an anti-tamper warning device 30 A second embodiment of a screw cap system according to the invention is shown in figs. 2a-d. The main differentiating features compared to the embodiment of figs. 1a-d, is the design of the inner and outer cap elements. In the second embodiment, the inner cap element 5 is a circular plate element, as opposed to the first embodiment, wherein the inner cap element features the threads for interaction with 35 the threaded opening. The operation / function of the second embodiment is similar to the first embodiment. However, to provide a relative motion between the top surface 6 of the inner cap element 5 and the inner surface 8 of the outer cap element 7, the inner cap element comprises at least one tab for interaction with a cooperating recess / slot in the top edge 27 of the threaded opening 4, or vice versa. The tab / recess assembly is not shown. During initial opening of the screw cap 1, the tab on the inner cap element 5 ensures that the inner cap element is stationary relative the threaded opening while the outer cap element rotates until the TTI system is in an activated position, i.e. the first and second sections 2,2’,3,3’ are aligned. The 5 tab / recess is dimensioned / designed such that the tab is lifted out of the cooperating recess due to the angle of the threads when the activated position is reached. A third embodiment of a screw cap system according to the invention is shown in figs. 3a-d. The screw cap system comprises a collar and threaded opening as described for the first embodiment (not shown). The main differentiating feature of 10 the third embodiment relative the first and second embodiment is that the multiple first sections 2 and multiple corresponding second sections 3 are moved relative to each other, and the TTI system activated, by pushing the outer cap element 7 against the inner cap element 5 (i.e. not by rotation) in a linear movement. After activation, the inner and outer cap element is locked together. The outer cap must be 15 pushed to activate the TTI system and allow rotation of the entire screw cap relative a threaded opening. The outer cap element comprises recesses arranged at the lower edge for interaction with tabs / stopper 13 arranged on the inner cap element. The tabs prevent rotation of the screw cap before activation and ensures correct positioning of the first and second sections during activation. 20 A fourth embodiment of a screw cap system according to the invention is shown in figs. 4a-d. The main differentiating feature of the third embodiment relative the first and second embodiment is that the multiple first sections 2,2’ and the multiple second sections 3,3’ are arranged at the collar 15 around the threaded opening 4. The first sections 2,2’are arranged in compartments in a first circular channel 28 25 having a first surface 6’, and the second sections 3,3’ are arranged in a cooperating transparent second circular channel (or profiled ring) 29. The compartments are delimited by lip seals 16. The first and second channel are slidably connected, forming a closed circular space. The screw cap 1 is releasably connected to the second channel 29, such that the second sections move relative to the first sections 30 until they are in contact with each other and the TTI system is activated. After activation the connection between the screw cap and the second channel are released. A fifth embodiment of a screw cap system according to the invention is shown in figs. 5a-d. In this embodiment, the first section 2 comprising a liquid first 35 composition 9 is arranged in an outer cap element 7, and the second section 3 comprising a second composition 10 distributed in a longitudinal element 12 is arranged in an inner cap element 5. The longitudinal element comprises a material through which the first composition 9 may migrate in a time temperature dependent manner, e.g. a type of wick or porous material. During rotation of the outer cap 40 element, the first section is aligned and brought into contact with one end of the second section 3, such that the TTI system is activated. In this particular embodiment, the first composition may for instance comprise a reducing agent and the second composition may comprise a compound that changes color when reduced by said reducing agent in the first composition. Specific examples of suitable 5 compositions are disclosed in for instance WO 2012 / 141594. Depending on the connection between the inner and outer cap element, the TTI system may be activated upon opening the container 17 for the first time, fig. 5c, or upon closing of the container for the first time after opening, fig. 5b. The embodiments disclosed in figs. 6-8 (the sixth to eight embodiments) are similar 10 to the fifth embodiment. However, in these embodiments the activation is not obtained by moving the first and the second section relative to each other. The first section comprising a liquid first composition is arranged close to one end of a longitudinal element 12 in the second section. The first composition is for instance separated from the second composition (or second section or longitudinal element) 15 by a weak seal 32. Both the first section and the second section is arranged at the top surface of the inner cap element, figs. 6,7 or at an inner surface of the outer cap element, fig. 8. In these embodiments, an inner surface of the outer cap element, figs. 6,7 or a top surface of the inner cap element, fig. 8, comprises an activator element, i.e. an activator tap 30 or spring element 31. The TTI system is activated 20 by moving the outer cap element relative to the inner cap element, such that the spring element interacts with the first section and breaks the weak seal 32. The activation is obtained by rotation of the outer cap element, figs. 6,7 or by pushing the outer cap element towards the inner cap element, fig. 8. The ninth embodiment in figs. 9a-b is similar to the embodiment in fig. 3, having a 25 different design of the time and temperature dependent visual change. A tenth embodiment of a screw cap system according to the invention is shown in figs. 10a-b. In this embodiment, the TTI system comprises an arm / tab 21 arranged to break a sealing 23 between the first section 2 and the second section 3 when the screw cap is twisted. The tab 21 is arranged on a releasable ring 22 connected to a 30 lower edge of the screw cap 1. The ring is released from the lower edge when the screw cap and the releasable ring are twisted beyond a desired range and the TTI system is activated. The first section 2 and the second section 3 is arranged on the collar 15 comprising the threaded opening, or on the surface of the container 17 on which the screw cap system is arranged. The first section and the second section are 35 arranged such that the sealing is broken when the arm / tab 21 is moved over at least parts of the first or second section when the screw cap is twisted. Alternative solutions for use with the system in figs. 10a-b are shown in fig. 11. 40 The function of the releasable ring 22 and the screw cap 1 is illustrated in fig. 12. Various functional combinations of a screw cap 1 featuring an inner cap element 5 and an outer cap element 7 are illustrated in fig. 13. 5 Various snap-fit connections between an inner cap element 5 and an outer cap element 7 are illustrated in fig. 13. Various alternative designs of the time temperature dependent visual change 10 obtained by a TTI system in a screw cap system according to the invention is illustrated in fig. 15. When used on bottles etc. wherein the threaded opening is an integral part of the container, the screw cap system does not comprise the threaded opening. 15 In addition to the features described in connection with the above embodiments, the screw cap system according to the invention may also comprise any required ratchet rings, tabs / recess assemblies etc. to obtain a desired sequence of movement between an inner cap element, an outer cap element and / or a collar, releasably locking the screw cap to a threaded opening or any other advantageous function. 20 All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety. In case of conflict, the present specification, including definitions, will prevail. The TTI may also have a threshold temperature, i.e. the progress of the TTI indicator is slowed down or stopped when below the given threshold temperature. 25 This may be obtained by for instance having a liquid first composition distributed in a wax matrix, wherein the wax matrix has a melting temperature equal to a desired threshold temperature. 30

Claims

1. A screw cap system comprising a screw cap (1) for closure of a threaded opening (4) in a container (17) and a time temperature indicator system, wherein 5 - the time temperature indicator system comprises at least one first section (2) comprising a first composition (9) and at least one second section (3) comprising a second composition (10); the first composition and the second composition providing a time and temperature dependent visual change in appearance when brought into contact with each other; the first 10 and second composition initially being separated; and the time temperature indicator (TTI) system is activated by moving the screw cap (1), wherein the first and the second composition comes into contact with each other during said movement. 15 2. The screw cap system according to claim 1, wherein the at least one first section is moved relative to the at least one second section when the screw cap is moved to activate the TTI. 20 3. The screw cap system according to claim 1 or 2, wherein the at least one first section or the at least one second section may be moved between a first position (X) and a second position (Y), in the first position the first and the second composition are separate and in the second position the first and the second composition are in contact. 25 4. The screw cap system according to any of claims 1-3, wherein the at least one first section is arranged at a first surface (6,6’) and the at least one second section is arranged at a second surface (8,8’) facing the first surface. 30 5. The screw cap system according to claim 4, wherein the first and the second surface are arranged to rotate relative to each other between the first and the second position when the screw cap is twisted.

6. The screw cap system according to any of the preceding claims, wherein the 35 screw cap (1) comprises an inner cap element (5) and an outer cap element (7), and the inner cap element is moved relative to the outer cap element when the time temperature indicator (TTI) system is activated by moving the screw cap (1). 40 7. The screw cap system according to claim 6, wherein the first and the second surface are arranged to move relative to each other between the first and the second position when the outer cap element is pushed towards the inner cap element.

8. The screw cap system according to claim 6, wherein the first and the second 5 surface are arranged to move relative to each other between the first and the second position when the inner cap element is pulled towards the outer cap element.

9. The screw cap system according to any of claims 6-8, wherein the inner cap 10 element (5) comprises the first surface (6) and the outer cap element (7) comprises the second surface (8).

10. The screw cap system according to any of claims 6-9, wherein the first and the second surface are arranged to rotate relative to each other between the first and 15 the second position when the outer cap element is twisted.

11. The screw cap system according to any of the preceding claims, comprising a threaded opening (4) featuring a collar (15) arrangeable on a container. 20 12. The screw cap system according to any of claims 4-7 and 10, wherein the collar comprises the first surface (6’), or the first surface is on a container on which the collar may be arranged, and the second surface (8’) is arranged on a ring element (16) releasably connected to the screw cap (1), such that the second surface is rotated relative the first surface and the ring element released from the 25 screw cap when the screw cap is twisted during opening.

13. The screw cap system according to any of the preceding claims, wherein at least one of the first section and the second section comprises a transparent material, such that the visual change in appearance is visible on an external surface of the 30 screw cap system, preferably the second surface is part of a transparent section.

14. The screw cap system according to any of claims 4-12, wherein the first section comprises a recess / pocket in the first surface and the second section comprises a recess / pocket in the second surface. 35 15. The screw cap system according to any of claims 4-12, comprising a seal-breaking element arranged to break a sealing between the at least one first section and the at least one second section when the first section and the second section are moved between the first position and the second position. 40 16. The screw cap system according to claim 1, comprising a seal-breaking element arranged to break a sealing (23) between the at least one first section and the at least one second section, wherein the seal-breaking element is an arm / tab (21) arranged on a releasable ring (22), the ring connected to a lower edge of the 5 screw cap (1), such that the ring is released from the lower edge when the screw cap and the releasable ring are twisted beyond a desired range.

17. The screw cap system according to claim 15, wherein the at least one first section and the at least one second section is arranged on a collar comprising a 10 threaded opening, or on the surface of a container on which the screw cap system is arranged, the at least one first section and the at least one second section arranged such that the sealing is broken when the arm / tab is moved over at least parts of the first or second section when the screw cap is twisted. 15 18. The screw cap system according to claim 16, wherein the collar is arrangeable at a container opening.

19. The screw cap system according to any of the preceding claims, wherein the first composition is a liquid or gel composition, and the second composition is a dry 20 composition.

20. The screw cap system according to any of the preceding claims, wherein the first composition is a liquid composition and the second composition is distributed in a longitudinal element (12) made in a material through which the liquid 25 composition may migrate in a time-dependent manner, and wherein the first composition and one end of the longitudinal element comes into contact with each other when the time temperature indicator (TTI) system is activated by moving the screw cap (1) . 30 21. A screw cap system comprising a screw cap (1) for closure of a threaded opening (4) in a container and a time temperature indicator system, wherein - the time temperature indicator system comprises at least one first section (2) having a coloured liquid composition (11) and at least one second section (3) comprising a longitudinal element (12) made in a material 35 through which the coloured liquid composition may migrate in a time-dependent manner; the first and second section initially being separated; and the time temperature indicator (TTI) system is activated by moving the screw 40 cap (1), such that the coloured liquid composition and one end of the longitudinal element comes into contact with each other during said movement.

22. The screw cap system according to claim 23, wherein the at least one first section is moved relative to the at least one second section when the screw cap is moved to activate the TTI. 5 23. The screw cap system according to claims 23 or 24, wherein the at least one first section or the at least one second section may be moved between a first position (X) and a second position (Y), in the first position the first and the second composition are separate and in the second position the first and the second 10 composition are in contact. DD 1 4 3 2 2’ 3’ 2’,3’ 6,86 8 9105 7 Fig.1a Fig.1b(D-D) Fig.1c(D-D) Fig.1d(D-D) 24 25 15 26 Fig.2a DD Fig.2b(D-D) Fig.2c(D-D) Fig.2d(D-D) 6,8 4 1 5 3 2 3’ 2’ 2’,3’ 910 6 8 26 15 27 Fig.3aFig.3b Fig.3c(A-A) Fig.3d(topview) AA 2,9 3,10 7 5 8 6 13 13 14 3,10 2,9 15 1 4 6’ 8’ 9 10 DD Fig.4a Fig.4b(D-D) Fig.4c(D-D) Fig.4d(D-D) 16 2 2’ 3’ 3 2’,3’ 28 28 29 1 17 4 2,9 3,10,12 2,9 3,10,12 9,10 10 9 Fig.5a Fig.5b(topview) Fig.5c(topview) 7 7 5 5 Fig.6a Fig.6b Fig.6c 30 32 2,9 3,10,12 7 5 Fig.7a Fig.7b 31 31 5 7 Fig.8a Fig.8bFig.8c 1 Fig.9a Fig.9b 2,9 5 7 1 21 22 23 2,9 3,1015 17 Fig.10a Fig.10b Fig.11 22 21 15 3,10 2,9 Fig.12 Fig.13 7 5 Fig.14 7 5 Fig.15