Double-layered container and packaged food

Abstract

To provide a double-layered container in which contents are hardly oxidized and the contents can be easily pushed out.SOLUTION: A double-layered container 1 has a neck 2, a body 3, and a bottom 4. The neck, the body, and the bottom are formed by an inner bag 6 and an outer shell 6, all of which are elastically deformable. The inner bag and the outer shell are joined at the neck, but separate at the body and the bottom, with ribs 8 that locally indent or bulge in the same area. The outer shell has air holes 7h. The body is composed of a pair of main walls 31 facing each other on the front and back sides and a pair of side walls 32 facing each other on the right and left sides, and has a flat shape, with the width of the main walls as viewed in a cross direction greater than the width of the side walls as viewed in a longitudinal direction. The pair of side walls have horizontal ribs 8a extending in the longitudinal direction, and the main walls have vertical ribs 8b extending in a vertical middle and recessed inward. When the body is crushed at the vertical middle, the vertical ribs come into close contact with the opposing main walls, forming gaps between the pair of main walls on the right and left of the vertical ribs, allowing the contents to pass through, making it easier to push the contents out.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a double-layered container in which an inner bag as an inner layer and an outer shell as an outer layer overlap each other and are partially separated, and in which ribs are formed on a flat, elastically deformable body portion.The present invention also relates to a packaged food product in which contents are accommodated in the double-layered container. [Background technology]

[0002] One example of a container is known that is not a double-walled container, but has an elastically deformable, flat-shaped body with ribs formed on the body (Patent Document 1). There are two types of ribs: those that extend in the vertical direction and those that extend in the circumferential direction. Multiple ribs that extend in the vertical direction are formed on the upper end of the body, and multiple ribs that extend in the circumferential direction are formed on the lower part of the body. In other words, there are no ribs that extend in the vertical direction in the middle part of the body that is easiest to press with a finger, and ribs are formed separately on the upper and lower sides.

[0003] Another example of a double container is one that has a cylindrical body, but the outer container and inner container are separable, and air accumulates between the outer container and inner container as the contents decrease (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-119477 [Patent Document 2] Japanese Patent Application Publication No. 2023-51244 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of the container of Patent Document 1, the contents are typically pushed out of the container by crushing the body to make the flat shape even flatter. If the body is crushed too hard to tightly seal the inner surfaces of the container, the contents are separated above and below the tightly sealed area, making it difficult to push out the contents. Furthermore, when crushed, not only does the pressed area become concave, but the depression also spreads from the pressed area to the left and right, elastically deforming in a straight line to both ends of the flat width of the body, causing the inner surface of the body to be tightly sealed along almost the entire width, making it difficult to push out the contents. Furthermore, in the case of the container of Patent Document 1, a restoring force is applied to the entire crushed body, making it easier for air to enter through the neck, making the contents more susceptible to oxidation than in the double-walled container of Patent Document 2.

[0006] Furthermore, in the case of the double-walled container of Patent Document 2, it is assumed that the inner container will collapse as the contents decrease, but the outer container will return to its original shape. The outer container is easy to return to its original shape if its body is cylindrical, but difficult to return to its original shape if it is flat. Furthermore, while the outer container can be pushed with a finger to return to its original shape, the inner container cannot be directly touched with a finger. Therefore, if the inner container is depressed and becomes tightly packed from front to back, it becomes difficult to improve the situation where the contents are difficult to push out.

[0007] The present invention was created in consideration of the above circumstances, and its object is to provide a double-walled container that is resistant to oxidation of the contents and allows the contents to be easily squeezed out. Another object of the present invention is to provide a packaged food product in which the contents are accommodated in a double-walled container. [Means for solving the problem]

[0008] The double-layered container of the present invention has a neck, body, and bottom that are continuous in the vertical direction. The neck, body, and bottom are formed by an inner bag and an outer shell that overlap in the inward-outward direction and are both elastically deformable. The inner bag and outer shell are joined at the neck, but separate at the body and bottom, and are provided with ribs that are locally concave or convex in the same location. The outer shell is provided with air holes that allow air to enter between the inner bag and the outer shell. The body is composed of a pair of main walls facing each other in the front-to-back direction and a pair of side walls facing each other in the left-to-right direction, and has a flat shape in which the width of the main walls as viewed from the front-to-back direction is longer than the width of the side walls as viewed from the left-to-right direction. Each of the pair of side walls is provided with a horizontal rib that extends in the left-to-right direction. At least one of the main walls is provided with a vertical rib in the middle in the vertical direction that extends in the vertical direction and is concave inward. The above are essential configurations of the present invention.

[0009] The longitudinal rib may be formed on only one of the main walls, but it is preferable to do as follows in order to widen the gap formed between the pair of main walls when the body is crushed to make the flat shape even flatter. The outer shell and the inner bag have longitudinal ribs at opposing positions in the front and rear of the pair of main walls.

[0010] The sizes of the inner bag and the outer shell do not matter, and the outer shape of the inner bag and the inner shape of the outer shell may match. However, if the outer shape of the inner bag and the inner diameter of the outer shell match at the body, there is essentially no gap between the inner bag and the outer shell, making it difficult for air to get between them. To make it easier for air to get between the outer shell and the inner bag and to make it difficult for the restoring force of the outer shell to be transmitted to the already crushed inner bag when the outer shell restores its shape, it is desirable to do the following. In the body, the outer shape of the inner bag is larger than the inner shape of the outer shell, and the inner bag overlaps inside the outer shell in a wrinkled state.

[0011] It does not matter whether or not a horizontal rib is present in the range directly to the side of the vertical rib. However, in order to prevent the depression in the pressed part from spreading to the left and right when the body is crushed and the vertical rib is brought into close contact with the opposing main wall, even if it spreads to the left and right, from reaching the side wall, in other words, to make it difficult for the side wall to be crushed in the range directly to the vertical rib and to form a wide passage between the pair of main walls, it is desirable to have at least one horizontal rib located in the range directly to the side of the vertical rib.

[0012] The number of horizontal ribs formed on the side walls is not important. However, in order to form a wide passage between a pair of main walls, it is desirable to have the following: each of the pair of side walls has three or more horizontal ribs spaced apart in the vertical direction. The uppermost and lowermost horizontal ribs are respectively located above and below the range directly to the side of the vertical rib. At least one horizontal rib is located in the range directly to the side of the vertical rib.

[0013] The shape of the bottom is not important. Also, since the body is flat, when compressing the body, it is natural for humans to try to compress it in a way that makes the flat shape even flatter, just as it appears. To make it easier to take this natural behavior and make it easier to create a situation where the vertical ribs of the main wall come into close contact with the opposing main wall, it is desirable to do the following: When viewed from the left and right, the bottom has left and right middle parts that are recessed upward relative to the left and right ends.

[0014] The packaged food of the present invention comprises a double container and a viscous material contained inside the inner bag of the double container. [Effects of the Invention]

[0015] In this invention, when the body is crushed from a flat shape to a flatter shape, the horizontal and vertical ribs allow the outer shell to easily restore its shape, even when the inner bag is crushed flat, making the contents less susceptible to oxidation. Furthermore, the vertical middle of the body is the area that is easiest to crush with your fingers. When the body is crushed at the vertical middle, the vertical ribs of the main walls come into close contact with the opposing main walls. This makes it easier for gaps to form between the pair of main walls on the left and right of the vertical ribs than in a double-walled container without vertical ribs. As a result, these gaps provide a passage for the contents, making it easier to push them out. Furthermore, when the body is crushed, the horizontal ribs prevent the left and right sides of the body from collapsing due to their restoring force, ensuring a passage and making it easier to push out the contents.

[0016] Furthermore, in the present invention, when vertical ribs are formed at positions facing each other front to back on a pair of main walls, when the body is crushed and the pair of vertical ribs come into close contact, the gap formed between the pair of main walls becomes wider, making it easier to push out the contents.

[0017] Furthermore, in the present invention, when the outer shape of the inner bag in the body is made larger than the inner shape of the outer shell, a gap is formed between the inner bag and the outer shell, which makes it easier for air to get between the outer shell and the inner bag, and when the outer shell restores its shape, the restoring force of the outer shell is less likely to be transmitted to the already crushed inner bag, making it less likely for the contents to oxidize.

[0018] Furthermore, in the present invention, when at least one horizontal rib is arranged in a range directly to the side of the vertical rib, a passage is easily formed between the vertical rib and the horizontal rib, making it easier to push out the contents.

[0019] In addition, in the present invention, when a pair of side walls each have three or more horizontal ribs and the uppermost and lowermost horizontal ribs are respectively arranged above and below the range directly to the side of the vertical rib, a passage is easily formed between the vertical rib and the horizontal rib over the entire range of the vertical rib, making it easier to push out the contents.

[0020] Furthermore, in the present invention, when the bottom is configured so that the left and right middle portions are concave upward relative to the left and right ends when viewed from the left and right direction, the bottom is easier to crush in the front-to-back direction but harder to crush in the left-to-right direction, making it easier to crush the body from a flat shape into a flatter shape and making it easier to create a situation where the vertical ribs of the main wall come into close contact with the opposing main wall. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front view showing a double container according to a first embodiment of the present invention, with a portion thereof in cross section. [Figure 2] 1A to 1C are a side view, a plan view, and a bottom view showing a double container of a first embodiment. [Figure 3] FIG. 2 is an enlarged cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 2 is a front view showing the double container of the first embodiment in a crushed state. [Figure 5] FIG. 2 is a plan view showing the double container of the first embodiment in a crushed state. DETAILED DESCRIPTION OF THE INVENTION

[0022] The double-walled container 1 of the first embodiment of the present invention shown in Figures 1 to 3 is formed by direct blow molding. The parison from which the double-walled container 1 is made has a two-layer structure in which a cylindrical inner layer, which becomes the inner bag 6, is covered by a cylindrical outer layer, which becomes the outer shell 7. The parison is clamped in a mold, air is blown into the interior of the parison, and the double-walled container 1 is formed by cooling. The parison connected to the double-walled container 1 is cut, and the double-walled container 1 is removed from the mold, after which air holes 7h are formed in the outer shell 7. Air is then sucked from within the inner bag 6, drawing air into the gap between the outer shell 7 and the inner bag 6 through the air holes 7h, partially peeling the inner bag 6 from the outer shell 7. Air is then blown into the inner bag 6, returning the inner bag 6 and the outer shell to their overlapping state in the inward-outward direction. The inner bag 6 and the outer shell 7 are made of different materials, and the inner bag 6 contains a material (EVOH: ethylene-vinyl alcohol copolymer) that is harder than the outer shell 7. Specifically, the inner bag 6 has a laminated structure in which multiple layers are stacked, and some of the layers (more specifically, the layers outside the innermost layer) are made of EVOH. During blowing, the double-layered container 1 is expanded beyond the shape it had in the mold. When blowing is stopped, the outer shell 7 and inner bag 6 return to their original shape due to the elasticity of the resin. However, since the inner bag 6 is made of a harder material than the outer shell 7, the outer shape of the inner bag 6 is slightly larger than the inner shape of the outer shell 7 in the restored state, and the inner bag 6 overlaps inside the outer shell 7 in a wrinkled state. Although the inner bag 6 contains a material harder than the outer shell 7, overall, the outer shell 7 has a greater restoring force than the inner bag 6. Specifically, the outer shell 7 is made thicker than the inner bag 6. Therefore, when the double-layered container 1 is crushed, the outer shell 7 is more likely to return to its original shape, while the inner bag 6 is more likely to maintain its crushed shape.

[0023] The double container 1 is made of an elastically deformable synthetic resin. It includes a neck 2, a body 3 extending downward from the bottom of the neck 2, and a bottom 4 closing the bottom of the body 3. The double container 1 is composed of an inner bag 6 forming the inner layer of the neck 2, body 3, and bottom 4, and an outer shell 7 forming the outer layer of the neck 2, body 3, and bottom 4. In this embodiment, the inner bag 6 and outer shell 7 are joined at the neck 2 and separated at the body 3 and bottom 4. This is because an air hole 7h is formed in the outer shell 7 below the neck 2, allowing air to be sucked in and blown into the interior of the inner bag 6 from the neck 2. The dimension of the body 3 in the direction perpendicular to the up-down direction is referred to as the width. When viewed from the front-to-back direction, the double container 1 has a wider body 3 and bottom 4 than the width of the neck 2. As a specific example, the ratio of the width (maximum value) of the body 3 to the neck 2 is 1:1.5 to 3. Also, when viewed from the left and right direction, the double container 1 has a width of the body 3 that is slightly wider than the width of the neck 2. As a specific example, the ratio of the width (maximum value) of the body 3 to the neck 2 is 1:1.1 to 1.5.

[0024] The neck 2 is cylindrical. A cap (not shown) is attached to the outer periphery of the neck 2. In this embodiment, a male thread 2a is formed on the outer periphery of the neck 2. The male thread 2a protrudes radially outward from its surrounding area.

[0025] It is also desirable that the neck 2 be equipped with a valve (not shown) that prevents the contents from passing through. The valve is not limited to a valve that completely closes the inside of the neck 2 when the contents are not pushed out (when the body 3 is not crushed) (for example, a valve with a slit in an elastic piece), but also includes a valve with a small opening (outlet). However, the valve elastically deforms as the contents are pushed out. An inner lid (not shown) may also be attached to the neck 2. The inner lid has an outlet that is smaller than the inside (opening) of the neck 2. The inner lid does not elastically deform even when the contents are pushed out. The valve and inner lid may also be attached together to the neck 2. When the valve and inner lid are attached together, the valve is attached below the inner lid. From the above, the valve is not limited to a valve that solely closes the inside of the neck 2, but may also be a valve that closes the inside of the neck by clogging the opening with the contents. That is, the valve may close the inside of the neck portion 2 alone, or in cooperation with the contents, or in cooperation with the inner cap and the contents.

[0026] The contents are filled inside the inner bag 6 of the double container 1 and sold as a packaged food. The contents are preferably a viscous substance. The viscous substance may be a paste-like substance. The viscosity of the viscous substance is, for example, 1000 mPa·s or more, preferably 1000 to 10,000,000 mPa·s, and more preferably 10,000 to 1,000,000 mPa·s. The viscous substance is a mixture of an insoluble substance with water, oils and fats, starch, a thickener, or the like. The insoluble substance may be, for example, vegetables, spices, meat, seafood, or the like, and may be used as is or after processing such as drying or pulverization. Specific examples of viscous substances include ginger, wasabi, garlic, green onion, mustard, yuzu pepper, plum paste, grated radish, etc., as well as emulsified mayonnaise, margarine, cooking sauce ketchup, curry paste, oil-based Chinese paste, etc. The viscous substance may contain solids of a size that can be pushed out of the double container. Specific examples of solids include chopped ginger and chopped garlic.

[0027] The fat or oil may be vegetable fat or animal fat, or processed fat such as shortening, margarine, fat spread, etc. For example, shortening is an edible fat or oil that is made primarily from vegetable oil and is in a paste form at room temperature.

[0028] The starch is a starch derived from a plant that can impart viscosity, such as starch derived from potatoes and other tubers, or from grains such as rice and corn, and may also be a processed starch that can increase viscosity by processing such starch through crosslinking or the like. The thickener may be, for example, xanthan gum or tamarind gum.

[0029] Strip-like ribs 8 are locally formed on the body 3. The width 8W (maximum value) of the ribs 8 is narrower than the inner diameter D of the neck 2, for example, and is preferably equal to or less than half of the inner diameter D. More specifically, the width 8W of the ribs 8 is 10 mm or less. When the body 3 is divided into thirds, top and bottom, the body 3 is divided into an upper portion, a middle portion, and a lower portion. When divided into thirds, the bottom portion 4 is included in the body 3. Furthermore, the boundary between the neck 2 and the body 3 is the position where the width begins to increase downward from the neck 2. In this embodiment, the ribs 8 are recessed relative to the surrounding area of ​​the ribs 8. Because the double container 1 is formed by direct blow molding, the ribs 8 are formed in the same area on the outer shell 7 and the inner bag 6.

[0030] The body 3 is composed of a pair of main walls 31 facing each other in the front-to-rear direction and a pair of side walls 32 facing each other in the left-to-right direction. The width 31W (maximum value) of the main walls 31 is longer than the width 32W (maximum value) of the side walls 32. As a result, the body 3 has a flat shape in which the width 31W as viewed from the front-to-rear direction is wider than the width 32W as viewed from the left-to-right direction. When the body 3 is cut in a direction perpendicular to the up-down direction, the cross-sectional shape of the body 3 is annular, the main walls 31 are substantially parallel to the left-to-right direction, and the left and right side walls 32 bulge out in a semicircular shape. Furthermore, in the body 3, the outer shape of the inner bag 6 is slightly larger than the inner shape of the outer shell 7; in other words, in the body 3, the outer surface area of ​​the inner bag 6 is larger than the inner surface area of ​​the outer shell 7. As a result, small gaps 9 are formed in places between the inner bag 6 and the outer shell 7.

[0031] A plurality of horizontal ribs 8a as the ribs 8 are formed on the side walls 32 at intervals in the vertical direction. In this embodiment, the pair of side walls 32 has four horizontal ribs 8a spaced apart in the vertical direction. The horizontal ribs 8a extend parallel to each other in the left-right direction. The horizontal ribs 8a are formed symmetrically at positions facing each other on the left and right of the pair of side walls 32.

[0032] One vertical rib 8b as a rib 8 is formed on the main wall 31 in the vertically central portion and the horizontally central portion. The vertical rib 8b extends parallel to the vertical direction. The vertical rib 8b is formed inside the vertical range L1 between the upper end of the uppermost horizontal rib 8a and the lower end of the lowermost horizontal rib 8a. The uppermost horizontal rib 8a and the lowermost horizontal rib 8a are also arranged above and below the range directly to the side of the vertical rib 8b. The vertical rib 8b is formed to be long in the vertical range L2 between the upper end of the second-highest horizontal rib 8a and the lower end of the third-highest horizontal rib 8a. Specifically, the upper end of the vertical rib 8b is located higher than the upper end of the second-highest horizontal rib 8a, and the lower end of the vertical rib 8b is located lower than the lower end of the third-highest horizontal rib 8a. Therefore, two horizontal ribs 8a are arranged in a range directly to the side of the vertical ribs 8b. The vertical ribs 8b are arranged with a gap in the left-right direction relative to the horizontal ribs 8a. The vertical ribs 8b are formed in positions facing each other in the front-rear direction on the pair of main walls 31 and are symmetrical in the front-rear direction.

[0033] The lower end of the bottom 4 is parallel to the left and right when viewed from the front-to-back direction. When the double container 1 is placed on a horizontal surface such as a table, the left and right ends of the lower end of the bottom 4 are in contact with the horizontal surface when viewed from the left and right direction, and the left and right middle portions are spaced upward from the horizontal surface. In other words, the left and right middle portions of the lower end of the bottom 4 are recessed relative to the left and right ends when viewed from the left and right direction. More specifically, the lower end of the bottom 4 is V-shaped, gradually rising from the left and right ends toward the middle portion. In addition, an air hole 7h is formed in the bottom 4 of the outer shell 7 to allow air to enter between the inner bag 6 and the outer shell 7. The air hole 7h is formed elongated in the left and right direction.

[0034] In the double-walled container 1 of the first embodiment, when the body 3 is crushed from a flat shape to a flatter shape, the horizontal ribs 8a and vertical ribs 8b allow the outer shell 7 to easily return to its original shape, even when the inner bag 6 is crushed flat, making the contents less susceptible to oxidation. Furthermore, as shown in Figures 4 and 5 , the vertically central portion of the body 3 is the area that is easiest to crush with a finger. When the body 3 is crushed in the vertically central portion at the position of the vertical ribs 8b, the vertical ribs 8b of the main walls 31 are in close contact with the opposing main walls 31. This makes it easier for gaps 11 to form between the pair of main walls 31 on the left and right of the vertical ribs 8b than in a double-walled container 1 without vertical ribs 8b. As a result, the gaps 11 serve as passages for the contents, making it easier to push them out. Furthermore, when the body 3 is crushed, the horizontal ribs 8a prevent the left and right sides of the body 3 from collapsing due to their restoring force, ensuring a passage and making it easier to push out the contents.

[0035] Furthermore, in the double container 1 of the first embodiment, the vertical ribs 8b are formed at positions facing each other in the front and rear of the pair of main walls 31. Therefore, when the body portion 3 is crushed and the pair of vertical ribs 8b come into close contact with each other, the gap 11 formed between the pair of main walls 31 becomes wider, making it easier to push out the contents.

[0036] In addition, in the double container 1 of the first embodiment, the outer shape of the inner bag 6 is larger than the inner shape of the outer shell 7 in the body 3, so a gap 9 is formed between the inner bag 6 and the outer shell 7, making it easier for air to enter between the outer shell 7 and the inner bag 6.When the outer shell 7 restores its shape, the restoring force of the outer shell 7 is less likely to be transmitted to the already crushed inner bag 6, making it less likely for the contents to oxidize.

[0037] Furthermore, the double container 1 of the first embodiment has a bottom 4 that is V-shaped when viewed from the left-right direction, which makes it easier to crush the bottom 4 in the front-to-back direction but harder to crush in the left-to-right direction, making it easier to crush the body 3 from a flat shape into a flatter shape and making it easier to create a situation where the vertical rib 8b of the main wall 31 is in close contact with the opposing main wall 31.

[0038] In addition, in the double container 1 of the first embodiment, two horizontal ribs 8a are arranged in the area directly to the side of the vertical rib 8b, which makes it easier to form a passage between the vertical rib 8b and the horizontal rib 8a, making it easier to push out the contents.

[0039] Furthermore, in the double container 1 of the first embodiment, each pair of side walls 32 has four horizontal ribs 8a, and the uppermost horizontal rib 8a and the lowermost horizontal rib 8a are respectively arranged above and below the range directly to the side of the vertical rib 8b, so that a passage is easily formed between the vertical rib 8b and the horizontal rib 8a over the entire range of the vertical rib 8b in the vertical direction, making it easy to push out the contents.

[0040] In addition, in the double container 1 of the first embodiment, the horizontal ribs 8a are formed symmetrically on the pair of side walls 32, so that passages are formed equally on the left and right sides of the vertical ribs 8b, making it easy to push out the contents. In addition, in the double container 1 of the first embodiment, the vertical ribs 8b prevent the inner bag 6 from shrinking in the vertical direction, making it easy to crush flat.

[0041] The present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the invention. For example, in the above embodiment, only one vertical rib 8b is formed on each of the pair of main walls 31, but the present invention is not limited to this and multiple vertical ribs 8b may be formed on only one of the main walls 31 or on each of the pair of main walls 31. In addition, in the above embodiment, multiple horizontal ribs 8a are formed on each side wall 32, but the present invention is not limited to this and multiple horizontal ribs 8a may be formed on each of the side walls 32. In addition, in the above embodiment, the horizontal ribs 8a are formed symmetrically with respect to the pair of side walls 32, but the present invention is not limited to this and multiple horizontal ribs 8a may be formed asymmetrically with respect to the pair of side walls 32. [Explanation of symbols]

[0042] 1 double container 2 neck 2a male thread 3. Torso 31 Main wall 31W,32W width 32 Side wall 4 Bottom 6 Inner bag 7. Outer shell 7h Air Hole 8. Ribs 8a horizontal rib 8b vertical rib 8W width 9,11 Gap D Inner diameter L1, L2 upper and lower range

Claims

1. A double-layered container made of synthetic resin, which has a neck, a body, and a bottom that are continuous in the vertical direction, and in which the neck, the body, and the bottom are formed by an inner bag and an outer shell that overlap in the inward-outward direction and are both elastically deformable, In a double container, the inner bag and the outer shell are joined at the neck and separated at the body and bottom, and are provided with ribs that are locally concave or convex at the same locations, and the outer shell is provided with air holes that allow air to be taken in between the inner bag and the outer shell. the trunk portion is composed of a pair of main walls facing each other in the front-rear direction and a pair of side walls facing each other in the left-right direction, and has a flat shape in which the width of the main walls as viewed from the front-rear direction is longer than the width of the side walls as viewed from the left-right direction; The pair of side walls each include a horizontal rib extending in the left-right direction, A double container characterized in that at least one of the main walls has a vertical rib extending in the vertical direction and recessed inward at a middle portion in the vertical direction.

2. 2. The double container according to claim 1, wherein the outer shell and the inner bag have longitudinal ribs at opposing positions in the front and rear of the pair of main walls.

3. 3. The double container according to claim 1, wherein the outer shape of the inner bag is larger than the inner shape of the outer shell in the body portion, and the inner bag overlaps inside the outer shell in a wrinkled state.

4. 3. The double container according to claim 1, wherein at least one horizontal rib is disposed in a range directly to the side of the vertical rib.

5. The pair of side walls each include three or more horizontal ribs spaced apart in the vertical direction; 5. The double container according to claim 4, wherein the uppermost horizontal rib and the lowermost horizontal rib are respectively arranged above and below the range directly to the side of the vertical rib.

6. 3. The double container according to claim 1, wherein the bottom has a left and right intermediate portion recessed upward relative to the left and right ends when viewed from the left and right direction.

7. A packaged food comprising the double container according to claim 1 or 2 and a viscous material contained inside the inner bag of the double container.

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