Sealed container

Abstract

The present invention provides a sealed container that can suppress the rise in internal pressure of the container body without compromising the external shape of the cap, and can also suppress the decrease in sealing performance that occurs in the cap attached to the mouth of the container body. [Solution] A sealed container (1) comprises a container body with a mouth (3) and a cap (10) with a sealing portion (15). The container body has an internal thread (9) on the inside of the mouth (3). The cap (10) comprises an inner tube (11) with an external thread (19), a top wall (12) connected to the inner tube (11), and an outer tube (13) arranged with a gap between it and the inner tube (11). A partition wall (14) is provided inside the inner tube (11) to separate the inner tube (11) into an upper portion (11a) and a lower portion (11b). The external thread (19) is located below the upper portion (11a) of the inner tube (11). The sealing portion (15) is located above the partition wall (14).

Description

[Technical Field]

[0001] This invention relates to a sealed container. [Background technology]

[0002] A known example of a conventional sealed container is an internal pressure-resistant resin cap in which a gasket is placed between the mouth of the container body (bottle mouth) and the cap, and a protrusion larger than the outer shape of the mouth of the container body (bottle mouth) is provided integrally with the top wall (top plate) of the cap, forming a gap covered by the top wall between the peripheral side wall of the cap and the protrusion, while the protrusion compresses the outer peripheral edge of the gasket (see, for example, Patent Document 1). With this sealed container, a pressure-resistant sealing force is applied to the outer peripheral edge of the mouth of the container body (outer peripheral edge of the bottle mouth) due to both compressive deformation of the outer peripheral edge of the gasket and elastic deformation of the protrusion radially outward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 6-13349 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional sealed containers described above, the upper end of the mouth of the container body is sealed with a packing located on the back surface of the top wall of the cap by threading a female thread on the peripheral side wall of the cap onto a male thread on the mouth of the container body. Therefore, when the pressure (internal pressure) inside the container body increases, the top wall of the cap bulges, causing doming (backlink), which can affect the external shape of the cap. In addition, when doming occurs on the top wall of the cap, the bulging of the top wall causes deformation of the peripheral side wall connected to the top wall, which weakens the grip of the cap (thread), raising concerns about a decrease in sealing performance.

[0005] The object of the present invention is to provide a sealed container that can suppress the rise in internal pressure of the container body without impairing the external shape of the cap, and can suppress the decrease in sealing performance that occurs in the cap attached to the mouth of the container body. [Means for solving the problem]

[0006] (1) The present invention provides a sealed container comprising a container body having a cylindrical opening and a cap having a sealing portion attached to the opening and sealing the inner circumferential surface of the opening over its entire circumference, wherein the container body has a female thread on the inside of the opening, the cap comprises an inner cylinder having a male thread that removably screws into the female thread, a top wall connected to the inner cylinder and extending radially outward in an annular shape, and an outer cylinder connected to the radially outer portion of the top wall and spaced radially apart from the inner cylinder, wherein a partition wall is provided inside the inner cylinder to close the inside of the inner cylinder and divide the inner cylinder into an upper portion and a lower portion, the male thread is located below the upper portion of the inner cylinder and the sealing portion is located above the partition wall.

[0007] (2) In the sealed container of (1) above, it is preferable that the male thread is located in the lower part of the inner cylinder, the upper part of the inner cylinder is located radially outward from the lower part of the inner cylinder via the partition wall, and the partition wall forms the upper end of the lower part of the inner cylinder.

[0008] (3) In the sealed container of (1) or (2) above, the opening portion comprises an upper portion and a lower portion, the upper portion of the opening portion is positioned radially outward from the upper portion of the inner cylinder, and the sealing portion is a sealed cylinder that extends downward from the top wall and seals the inner circumferential surface of the upper portion of the opening portion over its entire circumference.

[0009] (4) In any one of the sealed containers described in (1) to (3) above, it is preferable that the female thread has a notch at least at one location in the circumferential direction that cuts through the female thread vertically.

[0010] (5) In the sealed container of any one of (1) to (4) above, the inside diameter of the mouth of the container body is preferably at least half the outside diameter of the body of the container body.

[0011] (6) In any one of the sealed containers (1) to (5) above, the container body is configured to accommodate contents having a carbon dioxide content of more than 3.0 volume percent, and it is preferable that the maximum inner diameter of the mouth portion is 30 mm or more. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a sealed container that can suppress an increase in internal pressure in the container body without damaging the external shape of the cap, and that can suppress loosening of the cap attached to the mouth of the container body. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view, partially in cross section, schematically illustrating a sealed container according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view showing an area X in FIG. [Figure 3] FIG. 2 is a plan view showing the sealed container of FIG. 1 from above. [Figure 4] FIG. 2 is a front view showing only the container body, which is one of the components of the sealed container of FIG. [Figure 5] 5 is a plan view showing the container body of FIG. 4 from above. FIG. [Figure 6] FIG. 2 is a front view showing only a cap, which is one of the components of the sealed container of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a sealed container according to one embodiment of the present invention will be described with reference to the drawings.

[0015] In Fig. 1, reference numeral 1 denotes a sealed container according to one embodiment of the present invention. In Fig. 1, the sealed container 1 is shown in cross section, including a cap 10. Fig. 2 shows an enlarged view of region X in Fig. 1. Fig. 3 shows the sealed container 1 from above.

[0016] As shown in Figure 1, the sealed container 1 comprises a container body 2 with a cylindrical mouth portion 3, and a cap 10 with a sealing portion 15 that is attached to the mouth portion 3 and seals the inner surface of the mouth portion 3 around the entire circumference.

[0017] The container body 2 is a stretch-blow molded container that is stretch-blow molded using a resin preform. The material of the container body 2 can be, for example, PET (polyethylene terephthalate) resin. However, the material of the container body 2 is not limited to resin.

[0018] Axis O is the central axis of the sealed container 1. In this embodiment, the central axis of the sealed container 1 and the central axis of the cap 10 are coaxial with axis O. Here, "lower side" refers to the side of the container body 2 along axis O, and "upper side" refers to the side of the cap 10 along axis O. Also, "axial direction" refers to the direction in which axis O extends. Furthermore, "radial direction" (also called "perpendicular direction") refers to the direction perpendicular to the axial direction (up and down direction). Also, "inside in the radial direction" (also called "inside in the radial direction") refers to the side closer to axis O in the radial direction, and "outside in the radial direction" (also called "outside in the radial direction") refers to the side farther from axis O in the radial direction. Also, "circumferential direction" refers to the circumferential direction of axis O.

[0019] FIG. 4 shows only the container body 2. In this embodiment, the container body 2 is a bottle container. In this embodiment, the container body 2 includes a mouth 3, a neck 4 connected to the mouth 3, a shoulder 5 connected to the neck 4, a body 6 connected to the shoulder 5, and a bottom 7 closing the lower end of the body 6. A storage space S capable of storing contents is formed inside the container body 2. The storage space S is connected to the outside through an opening A formed inside the mouth 3. In this embodiment, the container body 2 contains a foamable liquid as its contents, as will be described later. For this reason, in this embodiment, the shape of the bottom 7 is a so-called petaloid shape. However, the shape of the bottom 7 is not limited to a petaloid shape and can be changed appropriately depending on the contents.

[0020] Furthermore, in this embodiment, the container body 2 is equipped with a neck ring 8. The neck ring 8 protrudes radially outward from the neck portion 4 and extends in an annular shape around its entire circumference. In this embodiment, the mouth portion 3 is positioned above the neck ring 8.

[0021] In this embodiment, the mouth portion 3 comprises an upper portion 3a and a lower portion 3b. Figure 5 shows the container body 2 from above. As shown in Figure 5, each portion from the mouth portion 3 to the body portion 6 extends radially and circumferentially in an annular manner around the entire circumference. Referring to Figure 4, in this embodiment, the lower portion 3b of the mouth portion 3 is connected to the neck portion 4. Also, in this embodiment, the upper portion 3a of the mouth portion 3 is located radially outward from the lower portion 3b. Specifically, in this embodiment, the upper portion 3a and the lower portion 3b are connected by an enlarged diameter portion 3c. The enlarged diameter portion 3c protrudes radially outward from the lower portion 3b. In this embodiment, the enlarged diameter portion 3c is inclined radially outward as it extends upward. The enlarged diameter portion 3c, together with the upper portion 3a and the lower portion 3b, extends radially and circumferentially in an annular manner around the entire circumference. In this embodiment, reference numeral D1 is the inner diameter of the upper portion 3a of the mouth portion 3. In this embodiment, reference numeral D2 denotes the inner diameter (diameter) of the lower portion 3b of the opening 3. In this embodiment, the inner diameter D1 of the opening 3 is larger than the inner diameter D2 of the opening 3.

[0022] In this embodiment, the container body 2 has an inner diameter D1 of the mouth 3 that is at least half the outer diameter (diameter) D3 of the body 6. Such a container is also called a wide-mouth container. In this embodiment, the body 6 has a straight shape with an equal outer diameter D3 along the axial direction.

[0023] In this embodiment, the container body 2 contains contents with a carbon dioxide content exceeding 3.0 volume percent. Examples of contents include carbonated water, soft drinks such as cider, and alcoholic beverages such as beer and sparkling wine. However, the contents are not limited to effervescent contents and can be non-effervescent contents.

[0024] The inner diameter of the opening 3 is preferably 30 mm or more, and more preferably the inner diameter D1 of the opening 3 is greater than 30 mm. In this embodiment, the inner diameter D1 of the opening 3 is 45 mm. Also in this embodiment, the outer diameter D3 of the body 6 is 66.5 mm. The inner diameter D2 of the opening 3 is 37.6 mm. However, these values ​​are exemplary. For example, in this embodiment, the values ​​of the inner diameter D1 of the opening 3 and the outer diameter D3 of the body 6 are such that the inner diameter D1 is at least half the outer diameter D3.

[0025] The container body 2 has an internal thread 9 on the inside of the mouth portion 3 .

[0026] In this embodiment, the internal thread 9 is provided on the inner circumferential surface of the lower portion 3b of the mouth portion 3. The internal thread 9 extends spirally around the axis O.

[0027] The female thread 9 has at least one notch C in the circumferential direction that cuts vertically through the female thread 9. As shown in Figure 4, the notches C are positioned in a straight line in the axial direction. As a result, as shown in Figure 5, the axially aligned notches C allow the storage space S to pass straight toward the opening A without being obstructed by the thread 9. In this embodiment, the container body 2 has a plurality of notches C. As a result, the contents stored in the container body 2 can flow axially along the notches C and through the gaps in the thread 9.

[0028] In this embodiment, the bottom surface of the notch C is flush with the inner circumferential surface of the opening 3 (in this embodiment, the inner circumferential surface of the lower portion 3b). That is, the radial depth of the notch C is the same as the radial height of the female thread 9. However, the bottom surface of the notch C can be located radially outward from the inner circumferential surface of the opening 3. That is, the radial depth of the notch C can be made radially deeper than the inner circumferential surface of the opening 3 (in this embodiment, the inner circumferential surface of the lower portion 3b). In other words, the notch C can be a groove formed on the inner circumferential surface of the opening 3.

[0029] On the other hand, the cap 10 is, for example, a resin cap formed by injection molding a resin using a mold. The material of the cap 10 can be, for example, PP (polypropylene) resin. However, the material of the cap 10 is not limited to PP resin.

[0030] Referring to Figure 2, the cap 10 comprises an inner tube 11 having a male thread 19 that removably screws into a female thread 9 provided on the container body 2, a top wall 12 that is connected to the inner tube 11 and extends radially outward in a ring shape, and an outer tube 13 that is connected to the radially outer portion of the top wall 12 and is arranged radially spaced apart from the inner tube 11.

[0031] FIG. 6 shows the cap 10 from its side. The male thread 19 extends spirally around the axis O. The male thread 19 may be provided intermittently (discontinuously) in the circumferential direction. When the male thread 19 is an intermittent thread, when the cap 10 is opened, the notch C of the female thread 9 provided in the container body 2 and the intermittent portion of the male thread 19 are aligned in the axial direction, forming a gap extending in the axial direction between the female thread 9 and the male thread 19. This gap allows gas filling the container body 2 to easily escape to the outside, preventing the cap 10 from being blown off when the cap 10 is opened.

[0032] Referring to FIG. 2, a partition wall 14 is provided inside the inner cylinder 11 to close the interior of the inner cylinder 11 and to separate the inner cylinder 11 into an upper portion 11a and a lower portion 11b.

[0033] 2, the male thread 19 provided on the cap 10 is disposed below the upper portion 11a of the inner cylinder 11. In this embodiment, the male thread 19 is disposed on the lower portion 11b of the inner cylinder 11. However, the male thread 19 may also be provided on a portion of the inner cylinder 11 that corresponds to the partition wall 14.

[0034] In this embodiment, the upper portion 11a of the inner cylinder 11 is disposed radially outward of the lower portion 11b via the partition wall 14. In this embodiment, the upper portion 11a of the inner cylinder 11 is disposed radially outward of the lower portion 11b. Specifically, in this embodiment, the upper portion 11a and the lower portion 11b are connected by an expanded diameter portion 11c. The expanded diameter portion 11c protrudes radially outward from the lower portion 11b. In this embodiment, the expanded diameter portion 11c is inclined radially outward as it extends upward. The expanded diameter portion 11c, together with the upper portion 11a and the lower portion 11b, extends annularly in the radial direction around the entire circumference.

[0035] In this embodiment, the partition wall 14 forms the upper end 11e of the lower portion 11b, which allows the upper portion 11a of the inner cylinder 11 to move freely relative to the partition wall 14, with the expanded diameter portion 11c as the base point. In other words, the partition wall 14 of the inner cylinder 11, together with the lower portion 11b, can move freely relative to the upper portion 11a that is continuous with the expanded diameter portion 11c.

[0036] 3 shows a state in which the interior of the inner tube 11 of the cap 10 is closed by the partition wall 14. In this embodiment, the inner tube 11 has a knurling 16 on the inner circumferential surface of the upper portion 11a. The knurling 16 has a plurality of ridges 16a extending in the axial direction and spaced apart in the circumferential direction.

[0037] Referring to FIG. 2, the sealing portion 15 is disposed at a position above the partition wall 14.

[0038] Referring to Figure 2, the upper portion 3a of the mouth 3 is positioned radially outward from the upper portion 11a of the inner cylinder 11. A gap R is formed between the upper portion 3a of the mouth 3 and the upper portion 11a of the inner cylinder 11, which is closed by the top wall 12. Furthermore, the sealing portion 15 is a sealing cylinder (inner ring) that extends downward from the top wall 12 and seals the inner circumferential surface of the upper portion 3a of the mouth 3 around its entire circumference. As a result, when the cap 10 is attached to the mouth 3 of the container body 2, it seals the inner circumferential surface of the mouth 3 of the container body 2 in a liquid-tight state, as shown in Figure 2.

[0039] In addition, in this embodiment, the top wall 12 of the cap 10 is provided with an annular projection 17 that extends downward from the top wall 12 and seals the upper end 3e of the mouth 3 around its entire circumference. The annular projection 17 is provided on the top wall 12 between the outer cylinder 13 and the sealing cylinder 15. As a result, when the cap 10 is attached to the mouth 3 of the container body 2, it further seals the upper end 3e of the mouth 3 of the container body 2 in a liquid-tight state, as shown in Figure 2.

[0040] The sealed container 1 is constructed by screw-fitting a male thread 19 on the inner cylinder 11 of the cap 10 to a female thread 9 on the mouth 2 of the container body 2. That is, the cap 10 is fixed to the mouth 3 of the container body 2 by screw-fitting the inner cylinder 11 of the cap 10 inside the mouth 3 of the container body 2. In this case, the inner cylinder 11 of the cap 10 is constrained radially inward by the mouth 3 inside the mouth 3 of the container body 2. Therefore, the sealed container 1 can suppress deformation of the threaded portion (male thread 9 and female thread 19) 90 that may occur due to an increase in the internal pressure of the container body 2. As a result, even when the internal pressure of the container body 2 increases, the screw-fitting engagement between the container body 2 and the cap 10 is maintained, thus preserving the airtightness of the cap 10 and providing a highly airtight sealed container.

[0041] Furthermore, with the sealed container 1, when the internal pressure of the container body 2 rises, the increase in internal pressure can be absorbed by the partition wall 14 bulging upward (so-called doming), as shown by the dashed line in Figure 2. Also, since the doming of the partition wall 14 occurs inside the inner cylinder 11, the effect on the threaded portion 90 located on the outside of the inner cylinder 11 can be suppressed. Therefore, with the sealed container 1, the airtightness of the cap 10 is better maintained, resulting in a sealed container with improved airtightness.

[0042] Furthermore, as described above, the sealed container 1 can suppress deformation of the threaded portion 90 while suppressing the rise in internal pressure of the container body 2. Therefore, the sealed container 1 can suppress the popping out of the cap 10 from the container body 2 (so-called "cap popping") caused by the rise in internal pressure of the container body 2, thus becoming a sealed container with so-called explosion-proof measures.

[0043] In addition, the sealed container 1 houses the partition wall 14 inside the inner cylinder 11. In other words, the sealed container 1 utilizes the bottom of the recess 10a that opens at the upper end of the inner cylinder 11 as the partition wall 14. Therefore, the doming of the partition wall 14 is not visible from the outside of the inner cylinder 11. For example, in this embodiment, since a portion of the total height of the cap 10 depends on the height of the inner cylinder 11, even if the partition wall 14 domes, there is no change in the total height of the cap 10 before and after the doming occurs. Therefore, the sealed container 1 does not impair the external shape of the cap 10.

[0044] Therefore, the sealed container 1 can suppress an increase in internal pressure in the container body 2 without damaging the external shape of the cap 10, and can also suppress loosening of the cap 10 attached to the mouth portion 3 of the container body 2.

[0045] Furthermore, in the sealed container 1, the external thread 9 of the container body 2 is disposed in the lower portion 11b of the inner tube 11. In this case, when a user drinks the contents of the container body 2 by putting their mouth to the mouth portion 3 of the container body 2, for example, referring to Figure 4, the user's mouth comes into contact with the upper portion 11a of the inner tube 11, where the external thread 9 is not provided. Therefore, with the sealed container 1, it is possible to improve the mouthfeel when drinking the contents by putting their mouth to the container body 2.

[0046] 2, in the sealed container 1, the male thread 19 of the container body 2 is disposed in the lower portion 11b of the inner tube 11 of the cap 10, while the upper portion 11a of the inner tube 11 is disposed radially outward of the lower portion 11b of the inner tube 11 via a partition wall 14, and the partition wall 14 forms the upper end 11e of the lower portion 11b of the inner tube 11. In this case, the partition wall 14 can move freely relative to the upper portion 11a together with the lower portion 11b of the inner tube 11, while the lower portion 11b of the inner tube 11 is firmly fixed radially inward by the opening 3 of the container body 2. As a result, only the partition wall 14 can move freely and efficiently. Therefore, according to the sealed container 1, it is possible to further suppress an increase in internal pressure in the container body 2 and to further suppress loosening of the cap 10.

[0047] Additionally, in the sealed container 1, the upper portion 3a of the mouth 3 of the container body 2 is positioned radially outward of the upper portion 11a of the inner tube 11 of the cap 10, while the sealing portion 15 hangs down from the top wall 12 to seal the entire inner circumferential surface of the upper portion 3a of the mouth 3. In this case, by positioning the sealing portion 15 of the cap 10 away from the inner tube 11, even if deformation occurs in the upper end portion 11a of the inner tube 11, it is possible to suppress deformation that may occur in the sealing portion 15 provided on the top wall 12 connected to the upper portion 11a. Therefore, with the sealed container 1, it is possible to reliably maintain hermeticity between the mouth 3 of the container body 2 and the cap 10.

[0048] In addition, as shown in Figure 5, for example, the sealed container 1 has a notch C in at least one circumferential location of the female thread 9 that cuts vertically through the female thread 9 in the axial direction (up and down direction). In this case, the contents contained in the container body 2 can be effectively removed through the notch C. Therefore, with the sealed container 1, interference of the thread 9 that occurs when removing the contents is reduced, making it possible to remove the contents efficiently with less remaining contents.

[0049] Furthermore, in the sealed container 1, the container body 2 has an inner diameter D1 of the mouth 3 that is at least half the outer diameter D3 of the body 6. Such containers are also called wide-mouth containers, and conventional wide-mouth containers had concerns about the cap flying off due to the increase in internal pressure of the container body 2. In contrast, as described above, the sealed container 1 is a sealed container with so-called explosion-proof measures, and is therefore effective when used as a wide-mouth container, as in this embodiment.

[0050] By the way, in conventional sealed containers, such as those described in Patent Document 1, if the inner diameter D1 of the mouth 3 exceeds 30 mm, it was not possible to guarantee airtightness between the mouth of the container body and the cap when the contents containing more than 3.0 volume percent of carbon dioxide gas are stored in the container body 2. For example, if summer is defined and the container is stored at an ambient temperature of 40°C, conventional sealed containers may not be able to ensure airtightness at the top wall of the cap due to doming at the top wall of the cap. Specifically, in the sealed container described in Patent Document 1, if the container body is a container that holds contents containing 4.0 volume percent of carbon dioxide gas, and the inner diameter of the mouth of the container is 28 mm, it may not be possible to ensure airtightness at the top wall of the cap when stored at an ambient temperature of 40°C.

[0051] In contrast, in the sealed container 1, the container body 2 contains contents with a carbon dioxide content exceeding 3.0 volume percent, while the inner diameter D1 of the mouth 3 is 30 mm or more. For example, in the sealed container 1, the container body 2 is a container that contains contents with a carbon dioxide content of 4.0 volume percent, and the inner diameter D1 of the upper part 3a of the mouth 3 is 45 mm, and the inner diameter D2 of the lower part 3b is 37.6 mm. When using the container body 2 of this embodiment, the airtightness of the top wall 12 of the cap 10 can be ensured even when stored at an ambient temperature of 40°C. For this reason, the sealed container 1 is effective when used as a wide-mouth container that contains contents with a carbon dioxide content exceeding 3.0 volume percent in a container body 2 with an inner diameter D1 of the mouth 3 of 30 mm or more, preferably exceeding 30 mm, more preferably 37 mm or more.

[0052] As described above, the sealed container 1 can suppress an increase in internal pressure in the container body 2 without damaging the external shape of the cap 10, and can provide a sealed container that can ensure airtightness by the cap 10 attached to the mouth portion 3 of the container body 2.

[0053] As described above, exemplary embodiments of the present invention have been described, but the present invention is not limited to these embodiments and can be modified in various ways without departing from the spirit of the invention. For example, in the cap 10, the outer cylinder 13 can be made to protrude radially outward from the outer cylinder 13 of the top wall 12. In the cap 20, the sealing cylinder 15 can be provided integrally with the outer circumferential surface of the inner cylinder 11, thereby forming a stepped portion on the outer circumferential surface of the inner cylinder 11. [Explanation of symbols]

[0054] 1: sealed container, 2: container body, 3: mouth, 3a: upper part, 3b: lower part, 3c: enlarged diameter part, 4: neck part, 5: shoulder part, 6: body part, 7: bottom part, 8: neck ring, 9: male thread, 10: cap, 11: inner tube, 11a: upper part, 11b: lower part, 11c: enlarged diameter part, 12: top wall, 13: outer tube, 14: partition wall, 15: sealing part, 16: knurl, 16a: ridge, 17: annular protrusion, 19: female thread, 90: threaded part, C: notch

Claims

1. The container comprises a container body having a cylindrical mouth portion, and a cap having a sealing portion attached to the mouth portion and sealing the inner circumferential surface of the mouth portion over the entire circumference, The container body has an internal thread on the inside of the mouth portion, the cap includes an inner cylinder having a male thread that is removably threadedly engaged with the female thread, a top wall that is continuous with the inner cylinder and extends radially outward in an annular shape, and an outer cylinder that is continuous with the radially outer portion of the top wall and is disposed radially apart from the inner cylinder, a partition wall is provided inside the inner cylinder to close the inside of the inner cylinder and to divide the inner cylinder into an upper portion and a lower portion; the male thread is disposed below an upper portion of the inner cylinder, The sealed container, wherein the sealing portion is disposed above the partition wall.

2. The external thread is disposed on a lower portion of the inner cylinder, an upper portion of the inner cylinder is disposed radially outward of a lower portion of the inner cylinder via the partition wall, 2. The sealed container according to claim 1, wherein the partition wall forms an upper end of a lower portion of the inner cylinder.

3. the mouth portion has an upper portion and a lower portion, and the upper portion of the mouth portion is disposed radially outward of the upper portion of the inner cylinder, 3. The sealed container according to claim 1, wherein the sealing portion is a sealing tube that extends downward from the top wall and seals the entire inner circumferential surface of the upper portion of the mouth.

4. The sealed container according to claim 1 or 2, wherein the female screw has a notch that cuts vertically through the female screw at at least one location in the circumferential direction.

5. 2. The sealed container according to claim 1, wherein the inside diameter of the mouth of the container body is at least half the outside diameter of the body of the container body.

6. The container body contains a content having a carbon dioxide content of more than 3.0 volume percent, 2. The sealed container according to claim 1, wherein the maximum inner diameter of the opening is 30 mm or more.

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