Paper stretchable straw

Abstract

The subject of the present application is an expandable paper straw comprising a first straw having a first outer diameter and a second straw having a second inner diameter, wherein at least a portion of the first straw having the first outer diameter is coaxially positioned inside the straw having the second inner diameter, the first straw having at least two locking portions protruding from the outer surface of the first straw, and the second straw having at least two locking portions protruding from the inner surface of the second straw.

Description

[Technical field]

[0001] The subject of the present invention is a paper expandable straw.

[0002] The present invention relates to a drinking straw, and more particularly to an extendable straw made of a biodegradable material such as paper.

[0003] In the food industry, straws, usually made of plastic and with a long decay period of up to 200 years, are used to drink various beverages. These straws can be either one-stage or two-stage, straight or curved. Plastic straws are made as a single linear object or with an articulated section to allow bending. The construction of two-stage straws usually includes a lock that connects both parts, so that after inserting one part into the other, one can drink the beverage with the already assembled straw without worrying about leakage from the connection. Such a connection allows, for example, wrapping the straw in foil before drinking the beverage, removing the straw and unfolding it to its maximum length. Such straws are called telescopic straws.

[0004] Expandable drinking straws, particularly those made from plastic materials, are known in the prior art.

[0005] From document EP 0139074A a telescoping straw is known which comprises an outer straw and an inner straw. The inner straw is extended at the base and the outer straw is tapered at the tip. In both cases the change between the diameters is gradual and has a cone-like shape. The outer straw comprises a section with a slightly reduced diameter and the inner straw comprises a section with a slightly increased diameter, such that in the deployed configuration the section with the increased diameter of the inner straw overlaps the section with the reduced diameter of the outer straw.

[0006] Publication DE20309272U1 discloses a telescoping straw comprising an outer straw with an inwardly directed embossment and an inner straw with an inwardly directed embossment, where the embossment of the outer straw fits into the embossment of the inner straw due to the corresponding shape of the embossments, fixing the inner straw inside the outer straw.

[0007] In publication US 4657182 a telescoping straw is disclosed in which the inner straw is provided with an extension at one end which in turn is clamped to the outer straw to prevent the inner straw from slipping out, forming a unit.

[0008] The object of the present invention is a paper stretchable straw comprising a first straw having a first outer diameter and a second straw having a second inner diameter, the straw having the first outer diameter being at least partially inside the straw having the second inner diameter and coaxial with the straw having the second inner diameter. The straw according to the present invention is characterized in that the first straw has at least two locking parts on its outer side, and the second straw has at least two locking parts on its inner side.

[0009] The paper straw of the present invention is characterized in that at least two locking portions protruding from the inner surface of the first straw are spaced apart at a distance of at least half the diameter of the first straw.

[0010] The paper straw of the present invention is characterized in that at least two locking portions protruding from the outer surface of the first straw are spaced apart at a distance of at least half the diameter of the first straw.

[0011] The paper straw of the present invention is characterized in that the distance between the first and second locking portions of the first and second straws, respectively, is at least 2 mm.

[0012] The paper straw of the present invention is characterized in that the locking portion has a ring-shaped embossed shape.

[0013] The paper straw of the present invention is characterized in that the locking parts have different heights and widths.

[0014] The paper straw of the present invention is characterized in that the locking portion is adapted to form a seal at the joint of the elastic portion.

[0015] The paper straw of the present invention is characterized in that at least one locking portion of a first straw is positioned at a distance of at least half the diameter of the first straw from one end of the first straw.

[0016] The paper straw of the present invention is characterized in that at least one locking portion of the second straw is positioned at a distance of at least half the diameter of the second straw from one end of the second straw.

[0017] The paper straw of the present invention is characterized in that the inner diameter at one end of the second straw is smaller than the outer diameter of the first straw.

[0018] The paper straw of the present invention is characterized in that the at least two locking portions of the first straw and the at least two locking portions of the second straw are arranged at a distance corresponding to the diameter of the first straw.

[0019] The paper straws of the present invention are characterized in that the distance between the locking portions of the first straw is greater than the width of the locking portions of the second straw, and the distance between the locking portions of the second straw is greater than the width of the locking portions of the first straw.

[0020] The paper straws of the present invention are characterized by having two configurations, in the first configuration the first straw is substantially inside the second straw and a portion of the first straw protrudes from the second straw so that the first straw can be pulled out from the second straw, while in the second configuration the first straw is substantially pulled out from the second straw such that at least one locking portion of the first straw is located between the locking portions of the second straw or at least one locking portion of the second straw is located between the locking portions of the first straw.

[0021] In the second configuration, the paper straw of the present invention is characterized in that in the first working position, one of the locking portions of the first straw is located between the locking portions of the second straw, and in the second working position, the second locking portion of the first straw is located between the locking portions of the second straw.

[0022] The paper straw of the present invention is characterized in that in the second configuration, the side of at least one locking portion protruding from the outer surface of the first straw is in contact with the side of at least one locking portion protruding from the inner surface of the second straw.

[0023] The advantage of the paper straw is that it is biodegradable. Moreover, the advantage of the telescopic joint is that it guarantees the axial stability of the telescopic straw in the deployed configuration. Another advantage of the telescopic straw according to the invention is that the user clearly feels the moment when the first locking part is captured while deploying the straw and can easily stop the deployment movement, while at the same time preserving the possibility to fully deploy the straw if necessary. Moreover, the straw according to the invention minimizes the material consumption while maintaining the axial stability and also improves the safety of use, since in case of an accident the straw folds to the smallest dimensions.

[0024] The object of the present invention is to provide a method for the preparation of a semiconductor device, the method comprising the steps of: [Brief description of the drawings]

[0025] [Figure 1] 1 shows a cross section of an extendable straw according to the present invention. [Diagram 2] 1 shows a cross section of the locking part of the retractable straw. [Diagram 3] 1 shows a cross section of the inner straw of the retractable straw. [Figure 4] 1 shows an isometric view of the inner straw of a telescoping straw. [Figure 5a] 1 shows a cross section of a portion of the inner straw of the retractable straw, including a locking portion. [Figure 5b] 1 shows a cross section of a portion including the connection portion between the extendable straw and the lock portion of the outer straw. [Figure 6a] 13 shows a cross section of an inner straw of an extendable straw in accordance with another embodiment of the present invention. [Figure 6b] 13 shows a cross section of an outer straw of an extendable straw in accordance with another embodiment of the present invention. [Figure 6c] 13 shows a cross section of a connecting portion of an extendable straw in another embodiment according to the present invention. [Figure 7a] 13 shows a cross section of an inner straw of an extendable straw in accordance with another embodiment of the present invention. [Figure 7b] 13 shows a cross section of an inner straw of an extendable straw in accordance with another embodiment of the present invention. [Figure 8a] 1 shows a straw filled with liquid in a first working position. [Figure 8b] 1 shows a straw filled with liquid in an intermediate working position. [Figure 8c] 3 shows the straw filled with liquid in a second working position. [Figure 9] 13 shows the inner straw of a retractable straw in another embodiment. [Figure 10a] 1 shows an expandable straw with a crease at the end according to a first embodiment of the present invention. [Figure 10b] 13 shows an expandable straw with a crease at the end according to another embodiment of the present invention. [Figure 11a]1 shows a cross section through a portion of the inner straw with the locking portion of the telescoping straw. [Figure 11b] FIG. 11 is a cross-sectional view through a portion of an inner straw having a locking portion of an extendable straw according to another embodiment of the present invention. [Figure 12a] 1 shows an extendable straw in a first configuration. [Figure 12b] 1 shows a second embodiment of an extendable straw in a first configuration.

[0026] 1 shows a first embodiment of an extendable straw according to the present invention. The extendable straw comprises a first straw 10 having a substantially first outer diameter d1 and a second straw 20 having a second inner diameter d2. The straw 10 is positioned coaxially with the straw 20 having the second diameter such that at least a portion of the straw 10 is inside the straw 20. A portion of the straw 10 protrudes from the straw 20 to make it easier to pull out the first straw 10 from the second straw 20.

[0027] The first straw 10 has at least two locking portions 11, 12 protruding from its outer surface 13, while the second straw 20 has at least two locking portions 21, 22 protruding inwardly from its outer surface 23.

[0028] In FIG. 1, a straw according to a first embodiment of the present invention is shown in an extended configuration in one of its working positions.

[0029] The straws 10, 20 are spiral straws made from at least two, preferably three, paper bands joined together by a suitable adhesive suitable for food applications. Such straws are biodegradable and do not permanently pollute the environment.

[0030] 2 shows the profile of the second straw 20 and the first straw 10, and further clearly shows the locking features 21 and 22 located on the second straw and protruding from the inner surface 23 of the straw 20. The locking features 21, 22 have the form of circumferential embossments facing the inside of the second straw 20. The straws are made from a cellulose fiber material, which is amenable to molding, e.g., extrusion or embossing, while also having a certain degree of elasticity, which has an advantageous effect on the sealing of the expansion joint.

[0031] Conventional retractable paper straw joints are characterized by axial instability due to bending torques that occur when forces are applied perpendicular to the axis of the extended straw 10. The solution to this problem is to introduce at least two locking means that are spaced apart by a distance l1, l2, or at least half the diameter d1 of the inner straw 10. It is preferred to use joints that have more than one contact point between the first and second straws. In cross section, the contact points are in the form of points, but in three dimensions they form a circle on the circumference of the straw. In the illustrated embodiment, the first straw has four contact points 14, 15, 24, 25 with the second straw. The contact points 14, 15, 24, 25 are formed by the contact points between the locking parts 11, 12 of the first straw and the inner surface 23 of the second straw and the contact points between the locking parts 21, 22 of the second straw and the outer surface 13 of the first straw. Depending on the straw dimensions, a beneficial effect on axial stability can already be observed when the locking portions 21, 22 on the straw 20 are spaced 2 mm apart, where the straw 20 has an inner diameter of approximately 4 mm. Increasing the distance between the locking portions 21, 22 on the straw 20, while providing a further increase in the stabilizing effect, is not practical as it would contribute to an increase in material consumption in the final product, and the increased stability would result in material costs that would offset the beneficial stabilizing effect when the manufacturing process of the paper stretchable straw is evaluated comprehensively.

[0032] 3 shows straw 10 with first locking portion 11 and second locking portion 12 protruding from an outer surface 13 of straw 10. Because straw 10 interfaces with straw 20, the arrangement of the locking portions on straw 10 preferably substantially corresponds to the arrangement of the locking portions on straw 20. For straw 10, locking portions 11 and 12 subtend a distance l1 that is at least half the diameter d1 of straw 10. This corresponds to the arrangement of locking portions 21, 22 on straw 20.

[0033] FIG. 4 shows the first straw 10 in an isometric view, in particular the shape of the locking elements 11, 12. In conjunction with the cross-sectional views of FIGS. 5a and 5b, it can be seen that the locking elements 11, 12 have an embossed shape made substantially around the entire circumference of the straw 10. The locking elements 11, 12 may have an embossed shape due to the use of paper in the material of the stretchable straw. As a fibrous material, paper is susceptible to embossing. Despite the embossing, such materials retain some natural elasticity such that the locking elements 11 and 12 maintain the strength of the bond, while at the same time yielding when a certain critical axial force is applied to the straw 10 so that the stretchable straw can be extended. The locking elements 11, 12 having an embossed shape allow the stretchable straw to be maintained in an extended configuration at the same time, since both full extension and collapse of the stretchable straw require the application of the first critical axial force again to the straw 10. The locking portions 21, 22 of the straw 20 have a similar structure, but are directed towards the inside of the straw 20. Figure 5a shows the contact points 14, 15 of the locking portions 11, 12 of the first straw 10 with the inner surface 23 of the second straw 20. In this embodiment, the locking portions 11, 12 are substantially identical and form the same contact points, and therefore are numbered as identical in the figure. The firmness of the connection between the straws 10, 20 is ensured by the elasticity of the material of the locking portions 11, 12 which form the contact points 14, 15 and impinge on the inner surface 23 of the straw 20 at their apexes 16, 17. A similar situation occurs in the case of the connection between the straws 10 and 20 shown in Figure 5b. The apexes 26, 27 of the locking portions 21, 22 of the straw 20 form contact points 24, 25 with the exterior surface 13 of the straw 10, which ensure an airtight joint as well as support and stability.

[0034] 6A and 6B show a first straw 10 and a second straw 20 with corresponding locking portions 11', 12' and 21', 22', respectively. In this embodiment, the locking portions 11' and 12' have different heights h 11 and h 12 The locking portions 21' and 22' have different heights h 21 and h22 h 11 >h 12 and h 21 >h 22 In other embodiments not shown in the drawings, the relationship between the heights of the locking parts is reversed. 11 <h 12 and h 21 <h 22 Please also note that.

[0035] Figure 6c shows the connection of straws 10 and 20 with locking portions 11', 12' and 21', 22' respectively. A first contact point 24 is formed where the top 26 of locking portion 21' of straw 20 meets the outer surface 13 of straw 10. A second contact point 14 is formed where the top 16 of locking portion 11' of straw 10 meets the inner surface 23 of straw 20. For locking portions 12' and 22', which are shorter in height than locking portions 11' and 21', the contact point for locking portion 12' is point 15', while contact point 16' is formed where the top portion 17' meets the upper side 27' of locking portion 22'. Locks 12" and 22" in this embodiment function more as a threshold to notify a user pulling straw 10 from straw 20 towards the working position that first lock 21' has passed lock 12' and that the force with which straw 10 is being pulled from straw 20 must be reduced.

[0036] Figure 7A shows the w 11 >w 12 And, respectively, w 11 and w 12 1 shows a straw 10 including locking portions 11 and 12 having widths of w. In other embodiments not shown in the drawings, the relationship of the locking portion widths is reversed, w. 11 <w 12 may be also possible.

[0037] FIG. 7B shows 11 >h 12 and w 11 >w 121 shows an embodiment in which straw 10 is provided with locking portions 11 and 12 having different widths and heights such that: 1. In other embodiments, different height and width combinations may be used for locking portions 11 and 12. The height and width of locking portions 21 and 22 formed on straw 20 may vary in a similar manner. As the width of the locking portions increases, the airtightness of the telescopic joint increases, as does the critical axial force required to deploy the telescopic straw. A similar technical effect is observed when the height of the locking portions is increased.

[0038] FIG. 8a shows the telescoping straw in an expanded configuration and in a first working position filled with liquid F. The first working position occurs when the locking portion 11 is between the locking portions 21 and 22 of the straw 20. The locking portion 12 of the straw 10 touches the inner surface 23 of the straw 20 at the contact point 15, forming an airtight barrier by preventing the inflow of liquid F into the space between the locking portions 11, 12. A further barrier is formed by the locking portion 22 of the straw 20 contacting the outer surface 13 of the straw 10. The locking portions 11 and 21 of the straws 10 and 20, respectively, form a barrier that prevents the penetration of liquid F through the telescoping joint when the straw 10 is pulled out of the straw 20 in the direction D, and a lock that prevents the straw 10 from sliding out of the straw 20. The spacing of the locking elements 11, 12 and 21, 22 results in a limited possible back and forth displacement of the straws 10, 20. Moreover, as mentioned above, this increases the axial stability of the telescopic straw in the extended position, making it possible to limit leakage of liquid F through the subsequent sealing barrier even when a large force is applied to the extracted end of straw 10 in a direction perpendicular to the longitudinal axis, which results in the generation of a rotational moment tending to release the sealing barrier formed by locking portions 12 and 22. Further sealing barriers are formed by contact with the upper parts of locking portions 12 and 22, and similarly by contact with the upper parts of locking portions 11 and 21. These additional barriers have the advantageous effect of increasing the airtightness of the telescopic joint.

[0039] The telescopic straw in Fig. 8b is in an extended configuration at an intermediate position between the first position and the second working position. When the straw 10 is pulled out in the direction D at the intermediate position, the locking portion 11 of the straw 10 has moved behind the locking portion 21 of the straw 20, and the locking portion 12 is between the locking portions 21 and 22 of the straw 20. When the straw 10 is further pulled out from the outer straw 20, the telescopic straw moves to the second working position shown in Fig. 8c. In the second working position, the locking portion 12 of the straw 10 is in an intermediate position between the two locking portions 21, 22 of the outer straw 20 as described above. Furthermore, the sides of the locking portions 12, 21 are in contact with each other to form an additional airtight barrier. To ensure the rigidity, stability and firmness of the joint of the telescopic straw, it is preferable that the joint between the straws 10 and 20 has at least two support points. In this embodiment, in the second working position, there are three support points, namely, the contact points 14, 15 of the locking parts 11, 12 with the inner surface 23 of the straw 20, and the contact point 24 of the locking part 21 of the straw 20 with the outer surface 13 of the straw 10. To provide three support points, the length l from the edge of the outer straw 20 to the first locking part 21 is 22 It is important that the distance l1 between the two locking parts 11, 12 of the straw 10 is greater than or equal to the distance l1 between the two locking parts 11, 12 of the straw 10. The same condition can also be met in a configuration not shown in the figures, in which the distance between the second locking part 12 of the straw 10 and its edge is equal to or greater than the length of the distance between the locking parts 21, 22 of the straw 20.

[0040] FIG. 9 shows another embodiment of a retractable straw, specifically a straw 10 having locking portions 11 and 12. The locking portion 12 extends from the end of the straw 10. 12 Note that the straw 10 is located at a distance of 1 mm from the center of the straw 10 and has a diameter d1. 12 is less than half the diameter of the straw 10. Due to the resulting material savings, the distance l 12 It is preferable to minimize

[0041] The end 40 of the straw 20 without the locking portion has an inner diameter d1 smaller than the outer diameter d1 of the straw 10. 22It has. The diameter reduction has the form of a circumferential fold 41 and prevents the straw 10 from exiting the straw 20 through the end 40 when most of the straw 10 is inside the straw 20 in a folded configuration. Figure 10a shows the end 40 of the straw 20 without the locking portions 11 and 12 having a diameter d 22 <shows an embodiment having a fold 41 when having d1. In the embodiment shown in Figure 10a, there is a distance l1 between the locking portions 11, 12 of the straw 10, and the locking portions 21, 22 of the straw 20 are installed with a distance l2 between them when the distances are l1?l2?d1. For both the locking portions 11, 12 and the locking portions 21, 22, it has been determined through experiments that the preferred spacing of the locking portions is a distance corresponding to the diameter d1 of the straw 10. Thereby, a compromise point can be achieved between ensuring the axial stability of the telescopic joint and the material consumption related to the formation of a stabilization region where the straws 10 and 20 are inserted into each other when the telescopic straw is in an extended configuration.

[0042] Figure 10b shows another embodiment of the outer straw 20 with the end 40 having a minimum fold 41’. The distance l4 corresponds to the length of the end portion of the straw 20 with an inner fold. The distance l4 preferably extends deeply radially inward of the straw so as to reach at least the inner surface 18 of the inner straw 10. Figure 11a shows an enlarged view of a part of the telescopic straw where the locking portions 11, 12 of the straw 10 and the locking portions 21, 22 of the straw 20 can be clearly seen. In Figure 11a, the width of the locking portion 11 is w 11 , and the width of the locking portion 22 is w 22 as shown. The distance between the locking portions 11 and 12 is shown as l1, and the distance between the locking portions 21 and 22 is shown as l2. In this embodiment, the distance l1 is greater than the width w 11 , and the distance l2 is greater than the width w 22 .

[0043] Figure 11b shows the locking portion 21” formed as a fold or collar at the end of the straw 20 so that the material of the telescopic straw can be utilized to the maximum extent.

[0044] Figure 12a shows the telescoping straw in a first configuration, i.e. the folded (or transport) configuration. In this configuration, the straw 10 is mostly inside the straw 20 and is held inside the straw by a fold 41 at the free end 40 of the straw, i.e. the end of the straw that does not have the locking portions 21, 22 formed therein. In this folded configuration, the telescoping straw has a smaller overall length. This is the configuration in which the telescoping straw is attached, for example, to a beverage package.

[0045] Figure 12b shows the telescopic straw in a first working position in a second configuration, in which the straw 10 is pulled out of the straw 20 such that the locking portion 11 passes through the locking portion 22 and is between the locking portions 21 and 22. In the second working position, the sides of the locking elements 11 and 21 and the locking portions 12 and 22 come into contact with each other and the tightening of the telescopic joint is increased.

[0046] In order to pull the straw 10 to the first working position, it is necessary to apply a first limiting force in the axial direction. The passing of the clamp in the form of the lock 22 by the lock 11 is clearly perceptible to the user and allows the axial force with which the straw 10 is pulled to be less than the first limiting force threshold, stabilizing the telescopic straw in its first working position. If the locks 21, 22 and 11, 12 are positioned too close to each other, the user may not be able to reduce the axial force with which the straw 10 is pulled to be less than the first limiting force threshold, resulting in the lock 11 passing through the lock 21. This will cause the axial stability of the telescopic joint to be lost, but will not yet lead to the release of the seal, since at least the seal resulting from the contact of the lock 12 with the inner wall 23 of the straw 20 will be maintained. Only if the pulling of the straw 10 is continued with an axial force exceeding the first limiting force, will the lock 12 pass through the lock 21 as it slides out of the straw 20, leading to the inevitable release of the seal of the telescopic joint.

[0047] 12a and 12b, it should be noted that when straw 10 is forced into straw 20 with an axial force equal to or greater than the second threshold force, it may also be forced through crease 41 formed in free end 40 of straw 20. The ability to force through the creased free end of straw 20 is an important feature that enhances the safety of using the retractable straw, such that in the event of a fall while drinking a beverage through the retractable straw, the retractable straw may be folded to a minimum length to minimize possible injury.

[0048] The method and apparatus for producing expandable paper straws according to the present invention are described in European patent application EP20171882.2, the contents of which are incorporated herein by reference.

Claims

1. A first straw (10) having a first outer diameter (d1); a second straw (20) having a second inner diameter (d2); Including, At least a portion of the first straw (10) having the first outer diameter (d1) is coaxial with and located inside a straw having a second inner diameter (d2); The second straw (20) has at least two locking portions (21, 22) protruding from an inner surface (23) of the second straw (20); The first straw (10) is characterized in that it has at least two locking portions (11, 12) protruding from an outer surface (13) of the first straw (10).

2. The paper straw according to claim 1, wherein the distance (l2) between at least two locking portions (21, 22) protruding from the inner surface (23) of the second straw (20) is at least half the diameter (d1) of the first straw (10).

3. The paper straw according to claim 1 or 2, wherein the distance (l1) between at least two locking portions (11, 12) protruding from the outer surface (13) of the first straw (10) is at least half the diameter (d1) of the first straw (10).

4. 4. The paper straw according to claim 1, wherein the distance (l1, l2) between the first (11, 12) and second locking portions (21, 22) of the first and second straws (20) is at least 2 mm, respectively.

5. The paper straw according to any one of claims 1 to 4, wherein the locking portion (11, 12, 21, 22) has a ring-shaped embossed shape.

6. The paper straw according to any one of claims 1 to 5, wherein the locking portions (11, 12, 21, 22) have different heights or widths.

7. 7. The paper straw according to any one of claims 1 to 6, wherein the locking portion (11, 12, 21, 22) is adapted to form a seal at the expansion joint.

8. 8. The paper straw according to claim 1, wherein at least one of the locking portions (11, 12) on the first straw (10) is disposed at a distance (l12) from an end of the first straw (10) that is at least half the diameter (d1) of the first straw (10).

9. 9. The paper straw according to any one of claims 1 to 8, wherein at least one of the locking portions (21, 22) on the second straw (20) is disposed at a distance (l22) from an end of the second straw (20) that is at least half the diameter (d2) of the second straw (20).

10. The paper straw according to any one of claims 1 to 9, wherein the inner diameter (d2) at one end of the second straw (20) is smaller than the outer diameter (d1) of the first straw (10).

11. The paper straw according to any one of claims 1 to 10, wherein the at least two locking portions (11, 12) of the first straw (10) and the at least two locking portions (21, 22) of the second straw (20) are arranged at a distance (l1, l2) corresponding to a diameter (d1) of the first straw (10).

12. The paper straw according to any one of claims 1 to 11, wherein the distance (l1) between the locking portions (11, 12) of the first straw (10) is greater than the width (w22) of the locking portions (21, 22) of the second straw (20), and the distance (l2) between the locking portions (21, 22) of the second straw (20) is greater than the width (w11) of the locking portions (11, 12) of the first straw (10).

13. In a first configuration, the first straw (10) is substantially located inside the second straw (20), and a portion of the first straw (10) protrudes from the second straw (20) so that the first straw (10) can be pulled out from the second straw (20); In the second configuration, the first straw (10) is substantially pulled out from the second straw (20), and at least one of the locking portions (11, 12) of the first straw (10) is located between the locking portions (21, 22) of the second straw (20), or at least one of the locking portions (21, 22) of the second straw (20) is located between the locking portions (11, 12) of the first straw (10). The paper straw according to any one of claims 1 to 12, characterized in that it has two configurations.

14. 14. The paper straw of claim 13, wherein in the second configuration, in the first working position, one of the locking portions (11, 12) of the first straw (10) is located between the locking portions (21, 22) of the second straw (20), and in the second working position, the second locking portion (11, 12) of the first straw (10) is located between the locking portions (21, 22) of the second straw (20).

15. The paper straw according to claim 13 or 14, wherein in the second configuration, a side of at least one of the locking portions (11, 12) of the first straw (10) that protrudes from the outer surface of the first straw (10) is in contact with a side of at least one of the locking portions that protrudes from the inner surface of the second straw (20).

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