Container

By forming a groove in the side wall of the container to embed the handle, and providing a connecting pipe and a groove on the top to insert the cover, the problem of low space utilization when placing hard dairy containers is solved, and more efficient space utilization is achieved.

CN223479740UActive Publication Date: 2025-10-28INNER MONGOLIA MENGNIU DAIRY IND (GROUP) CO LTD +1
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Patent Information

Application Number
CN202423034473.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2025-10-28
Estimated Expiration
2034-12-09

AI Technical Summary

Technical Problem

The handles of existing hard dairy product containers are arranged on the outside of the containers, which requires a gap to be reserved when adjacent containers are placed, resulting in low space utilization.

Method used

The side wall of the accommodating cavity is designed to be recessed inward to form a first groove, and the handle is located in the groove to form an embedded handle. The opening edge of the accommodating cavity forms a connecting tube, and a second groove is provided on the top of the container to facilitate the insertion of the cover, thereby improving space utilization.

Benefits of technology

The embedded handle and connecting tube design eliminates the need to reserve space between adjacent containers, improving space utilization and reducing waste when placing containers.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of containers, and discloses a container which comprises a containing cavity, a handle and a cover. Specifically, the containing cavity is provided with an opening, the side wall of the containing cavity is recessed inwards to form a first groove, the handle is located in the first groove, the handle is connected to the inner wall of the first groove, and the cover body covers and seals the opening. According to the container, the problem that the space utilization rate is low when the container is placed is solved or improved.
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Description

Technical Field

[0001] This application relates to the field of container technology, and specifically to a container. Background Technology

[0002] Dairy products, as an important part of people's daily diet, bring many benefits to the body. These benefits are not only reflected in nutritional value, but also involve health maintenance and disease prevention.

[0003] As people's living standards improve, their demands for dairy products are also increasing, including for the containers used. Rigid containers are considered more premium than flexible pouches. Therefore, rigid containers, typically bucket-shaped, are increasingly being used for dairy products.

[0004] Currently, large-capacity dairy product containers on the market have handles on the outside of the containers for easy carrying by consumers. However, when two adjacent containers are placed, a gap needs to be reserved between the two containers to accommodate the handles, resulting in low space utilization. Utility Model Content

[0005] In view of this, this application provides a container to solve or improve the problem of low space utilization when placing containers.

[0006] This application provides a container, including:

[0007] The cavity has an opening, and the sidewall of the cavity is recessed inward to form a first groove.

[0008] A handle is located within the first groove, and the handle is connected to the inner wall of the first groove;

[0009] A cover that seals the opening.

[0010] In this embodiment, the receiving cavity has an opening for filling the receiving cavity with dairy products and for discharging the dairy products inside the receiving cavity. The side wall of the receiving cavity is recessed inward to form a first groove, and the handle is set in the first groove to form an embedded handle, which does not occupy the space on the outside of the receiving cavity. When placed, no space needs to be reserved between two adjacent receiving cavities for the handle, thus improving space utilization.

[0011] In one alternative implementation, the first groove is configured as an arc-shaped groove.

[0012] In this embodiment, the surface of the arc-shaped groove is smoother. When the hand grips the handle, the fingers can be inserted into the first groove without injuring the hand. Furthermore, when the hand grips the handle, it maintains a close distance from the inner wall of the first groove, so that the inner wall of the first groove fits the hand in a relatively close manner, which can minimize the space occupied by the receiving cavity.

[0013] In one alternative embodiment, the edge of the opening protrudes along the height direction of the receiving cavity to form a connecting tube, and the cover seals the end of the connecting tube.

[0014] In this embodiment, a connecting tube extends from the edge of the opening, facilitating the filling of the receiving cavity with dairy products and also making it easy to pour out the dairy products from the receiving cavity. The protruding connecting tube prevents the dairy products from flowing out along the outer wall of the receiving cavity and causing waste when pouring them out.

[0015] In one optional embodiment, the outer wall of the connecting pipe is provided with a first thread, and the cover is provided with a second thread adapted to the first thread, and the cover is threadedly connected to the connecting pipe.

[0016] In this embodiment, the second thread on the cover is screwed into the first thread on the outer wall of the connecting pipe, the cover is connected to the connecting pipe, and the cover seals the end of the connecting pipe.

[0017] In one alternative embodiment, a second groove is provided at the bottom of the receiving cavity, and the opening is provided at the top of the receiving cavity, wherein the second groove is adapted to the cover.

[0018] In this embodiment, the cover is placed over the entire connecting pipe, forming a wrap around it. The cover can be inserted into the second groove. The cover is located at the top of the receiving cavity, and the second groove is located at the bottom of the receiving cavity. When placing and transporting the receiving cavities, multiple receiving cavities need to be stacked along their height direction. Therefore, the cover of the lower receiving cavity is inserted into the second groove of the upper receiving cavity, so that the upper and lower receiving cavities can fit tightly together, reducing space waste and improving space utilization.

[0019] In one alternative embodiment, the cross-section of the receiving cavity is a regular polygon.

[0020] In this embodiment, the cross-section is a regular polygon, which facilitates matrix arrangement. The circumferential sidewalls of the receiving cavities are flat, allowing for a tighter fit between the planes during placement, thus saving space in the horizontal direction, improving space utilization, and enabling more receiving cavities to be placed in the same space.

[0021] In one alternative embodiment, the periphery of the receiving cavity is provided with a plurality of planar sidewalls, and the first groove is disposed on one of the planar sidewalls.

[0022] In this embodiment, multiple planar sidewalls are provided around the periphery of the receiving cavity. When placing the receiving cavities, the planar sidewalls are fitted together to reduce the distance between the two receiving cavities and improve space utilization.

[0023] In one alternative embodiment, the handle is a columnar structure and is arranged along the height direction of the receiving cavity.

[0024] In this embodiment, the handle is arranged along the height of the receiving cavity, and the hand holds the handle vertically, which can increase the grip strength and make it easier to lift the receiving cavity.

[0025] In one alternative embodiment, the side of the handle facing the bottom of the first groove is configured as a gripping surface, and the gripping surface is configured as an S-shaped curved surface along the height direction of the receiving cavity to fit the fingers.

[0026] In this embodiment, the handle is provided with a gripping surface, which is an S-shaped curved surface. When the hand grips the handle, the fingers fit against the S-shaped curved surface, which can increase the friction with the handle and improve the gripping comfort.

[0027] In one optional embodiment, the handle is provided with a cavity, and the cavity is provided with at least one through hole, which communicates with the inner cavity of the receiving cavity.

[0028] In this embodiment, a cavity is provided inside the handle and communicates with the inner cavity of the receiving cavity through a through hole. The cavity inside the handle can accommodate dairy products, thereby maximizing the storage space of the container. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a container according to an embodiment of this application;

[0031] Figure 2 This is a structural schematic diagram of a container from another angle according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Receiving cavity; 2. First groove; 3. Handle; 4. Connecting tube; 5. First thread; 6. Second groove; 7. Grip surface. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Dairy products, as an important part of people's daily diet, bring many benefits to the body. These benefits are not only reflected in nutritional value, but also involve health maintenance and disease prevention.

[0036] As people's living standards improve, their demands for dairy products are also increasing, including for the containers used. Rigid containers are considered more premium than flexible pouches. Therefore, rigid containers, typically bucket-shaped, are increasingly being used for dairy products.

[0037] Currently, large-capacity dairy product containers on the market have handles on the outside of the container for easy carrying. However, when two adjacent containers are placed together, a gap needs to be left between the containers to accommodate the handles, resulting in low space utilization. To solve or improve the problem of low space utilization when placing containers, this application provides a container.

[0038] The following combination Figures 1 to 2 This describes an embodiment of the present application.

[0039] According to an embodiment of this application, a container is provided, including a receiving cavity 1, a handle 3, and a lid. Specifically, the receiving cavity 1 is provided with an opening, the sidewall of the receiving cavity 1 is recessed inward to form a first groove 2, the handle 3 is located in the first groove 2 and is connected to the inner wall of the first groove 2, and the lid seals the opening.

[0040] In this embodiment, the receiving cavity 1 has an opening for filling the receiving cavity 1 with dairy products and for discharging the dairy products inside the receiving cavity 1. The side wall of the receiving cavity 1 is recessed inward to form a first groove 2, and the handle 3 is disposed in the first groove 2 to form an embedded handle 3, which does not occupy the space on the outside of the receiving cavity 1. When placed, no space needs to be reserved between two adjacent receiving cavities 1 for the handle 3, thus improving space utilization.

[0041] In one embodiment, the first groove 2 is configured as an arc-shaped groove.

[0042] In this embodiment, the surface of the arc-shaped groove is smoother. When the hand grips the handle 3, the fingers can be inserted into the first groove 2 without injuring the hand. Furthermore, when the hand grips the handle 3, it maintains a close distance from the inner wall of the first groove 2, so that the inner wall of the first groove 2 fits relatively close to the hand as a whole, which can minimize the space occupied by the receiving cavity 1.

[0043] Specifically, the first groove 2 is an elliptical groove, the major axis of which is parallel to the height direction of the receiving cavity 1, and the elliptical groove is located in the middle along the height direction of the receiving cavity 1.

[0044] In another embodiment, the arcuate groove can also be a hemispherical groove.

[0045] In another embodiment, a hand-shaped groove that fits the back of the hand can also be provided on the inner wall of the arc-shaped groove, further reducing the space occupied inside the receiving cavity 1.

[0046] In one embodiment, the edge of the opening protrudes along the height direction of the receiving cavity 1 to form a connecting tube 4, and the cover is sealed to the end of the connecting tube 4.

[0047] In this embodiment, a connecting tube 4 extends from the edge of the opening, facilitating the filling of the receiving cavity 1 with dairy products and also making it easy to pour out the dairy products from the receiving cavity 1. The connecting tube 4 protrudes to prevent the dairy products from flowing out along the outer wall of the receiving cavity 1 when pouring them out, thus preventing waste.

[0048] Specifically, the opening is a round hole with an inner diameter of 25.7 mm to 26.7 mm.

[0049] Specifically, the height H of the connecting pipe 4 is 19.7 mm to 20.3 mm, the inner diameter of the connecting pipe 4 is the same as the inner diameter of the circular hole, and the outer diameter of the connecting pipe 4 is 34.3 mm to 34.9 mm.

[0050] In one embodiment, the outer wall of the connecting pipe 4 is provided with a first thread 5, and the cover is provided with a second thread adapted to the first thread 5, and the cover is threadedly connected to the connecting pipe 4.

[0051] In this embodiment, the second thread on the cover is screwed into the first thread 5 on the outer wall of the connecting pipe 4, the cover is connected to the connecting pipe 4, and the cover seals the end of the connecting pipe 4.

[0052] In one embodiment, a second groove 6 is provided at the bottom of the receiving cavity 1, and an opening is provided at the top of the receiving cavity 1. The second groove 6 is adapted to the cover.

[0053] In this embodiment, the cover is placed over the entire connecting pipe 4, forming a wrap around the connecting pipe 4. The cover can be inserted into the second groove 6. The cover is located at the top of the receiving cavity 1, and the second groove 6 is located at the bottom of the receiving cavity 1. When placing and transporting the receiving cavities 1, multiple receiving cavities 1 need to be stacked along their height direction. Therefore, the cover of the lower receiving cavity 1 is inserted into the second groove 6 of the upper receiving cavity 1, so that the upper and lower receiving cavities 1 can fit tightly together, reducing space waste and improving space utilization.

[0054] Specifically, the second groove 6 is frustum-shaped, with a depth of 18mm, an upper diameter of 42mm, and a lower diameter of 45mm, which facilitates the connection between the cover and the second groove 6.

[0055] In one embodiment, the cross-section of the accommodating cavity 1 is a regular polygon. A regular polygonal cross-section facilitates matrix arrangement.

[0056] In this embodiment, the circumferential sidewalls of the receiving cavity 1 are flat, which allows for a tighter fit between the flat surfaces during placement, thereby saving space in the horizontal direction, improving space utilization, and allowing more receiving cavities 1 to be placed in the same space.

[0057] Specifically, the regular polygon is a square, and when multiple accommodating cavities 1 are placed horizontally, they can fit tightly together in the horizontal direction, forming a matrix arrangement. The side length of the square is 149mm.

[0058] Specifically, regular polygons can also be regular pentagons or regular hexagons.

[0059] In one embodiment, the periphery of the receiving cavity 1 is provided with a plurality of planar sidewalls, and the first groove 2 is provided on one of the planar sidewalls.

[0060] In this embodiment, multiple planar sidewalls are provided around the periphery of the receiving cavity 1. When the receiving cavity 1 is placed, the planar sidewalls are fitted together to reduce the distance between two receiving cavities 1 and improve space utilization.

[0061] Specifically, the planar sidewall is parallel to the height direction of the receiving cavity 1.

[0062] In one embodiment, the handle 3 is a columnar structure, and the handle 3 is arranged along the height direction of the receiving cavity 1.

[0063] In this embodiment, the handle 3 is arranged along the height direction of the receiving cavity 1. The hand holds the handle 3 vertically, which can increase the grip strength and make it easier to lift the receiving cavity 1.

[0064] In one embodiment, the side of the handle 3 facing the bottom of the first groove 2 is set as the gripping surface 7, and the gripping surface 7 is set as an S-shaped curved surface along the height direction of the receiving cavity 1 to fit the fingers.

[0065] In this embodiment, the handle 3 is provided with a gripping surface 7, which is an S-shaped curved surface. When the hand grips the handle 3, the fingers fit in contact with the S-shaped curved surface, which can increase the friction with the handle 3 and improve the gripping comfort.

[0066] Specifically, the side of the handle 3 facing away from the first groove 2 is flush with the side where it is located. This maximizes the space between the grip surface 7 and the bottom of the first groove 2, while ensuring that the handle 3 does not occupy the space outside the receiving cavity 1.

[0067] In one embodiment, the handle 3 is provided with a cavity, and the cavity is provided with at least one through hole, which communicates with the inner cavity of the receiving cavity 1.

[0068] In this embodiment, a cavity is provided inside the handle 3, and it communicates with the inner cavity of the receiving cavity 1 through a through hole. The cavity of the handle 3 can accommodate dairy products, thereby maximizing the storage space of the container.

[0069] Specifically, both ends of the handle 3 are provided with through holes that connect to the cavity, which facilitates the filling of dairy products from the cavity 1 into the cavity, and also facilitates the delivery of dairy products from the cavity to the inner cavity of the receiving cavity 1.

[0070] Specifically, the cavity 1, handle 3, connecting pipe 4, and first thread 5 are integrally formed.

[0071] Specifically, the container has a capacity of 3.6 kg of yogurt, and the height from the bottom of the cavity 1 to the end of the connecting tube 4 is 235.2 mm.

[0072] The following is an example, combined with Figures 1 to 2 A comprehensive explanation of all the above-mentioned plans is provided.

[0073] An embodiment of this application provides a container including a receiving cavity 1, a handle 3, and a lid. Specifically, the receiving cavity 1 has an opening, the sidewall of the receiving cavity 1 is recessed inward to form a first groove 2, the handle 3 is located in the first groove 2 and is connected to the inner wall of the first groove 2, and the lid seals the opening.

[0074] Specifically, the first groove 2 is configured as an arc-shaped groove. The first groove 2 is elliptical in shape, with its major axis parallel to the height direction of the receiving cavity 1, and the elliptical groove is positioned in the middle along the height direction of the receiving cavity 1.

[0075] Specifically, the arc-shaped groove can also be a hemispherical groove.

[0076] Specifically, a hand-shaped groove that fits the back of the hand can be provided on the inner wall of the arc-shaped groove to further reduce the space occupied inside the cavity 1.

[0077] Specifically, the edge of the opening protrudes along the height direction of the receiving cavity 1 to form a connecting tube 4, and the cover is sealed to the end of the connecting tube 4.

[0078] Specifically, the opening is a circular hole with an inner diameter of 25.7 mm to 26.7 mm, the height H of the connecting pipe 4 is 19.7 mm to 20.3 mm, the inner diameter of the connecting pipe 4 is the same as the inner diameter of the circular hole, and the outer diameter of the connecting pipe 4 is 34.3 mm to 34.9 mm.

[0079] Specifically, the outer wall of the connecting pipe 4 is provided with a first thread 5, and the cover is provided with a second thread that matches the first thread 5. The cover is threadedly connected to the connecting pipe 4.

[0080] Specifically, the bottom of the receiving cavity 1 is provided with a second groove 6, and the opening is provided at the top of the receiving cavity 1. The second groove 6 is adapted to the cover.

[0081] Specifically, the cross-section of the cavity 1 is a regular polygon.

[0082] Specifically, the regular polygon is a square, and when multiple accommodating cavities 1 are placed horizontally, they can fit tightly together in the horizontal direction and form a matrix arrangement.

[0083] Specifically, regular polygons can also be regular pentagons or regular hexagons.

[0084] Specifically, the periphery of the accommodating cavity 1 is provided with multiple planar sidewalls, and the first groove 2 is provided on one of the planar sidewalls.

[0085] Specifically, the planar sidewall is parallel to the height direction of the receiving cavity 1.

[0086] Specifically, the handle 3 is a columnar structure, and the handle 3 is arranged along the height direction of the receiving cavity 1.

[0087] Specifically, the side of the handle 3 facing the bottom of the first groove 2 is set as the gripping surface 7, and the gripping surface 7 is set as an S-shaped curved surface along the height direction of the receiving cavity 1 to fit the fingers.

[0088] Specifically, the side of the handle 3 facing away from the first groove 2 is flush with the side where it is located. This maximizes the space between the grip surface 7 and the bottom of the first groove 2, while ensuring that the handle 3 does not occupy the space outside the receiving cavity 1.

[0089] Specifically, the handle 3 has a cavity, and the cavity has at least one through hole that communicates with the inner cavity of the receiving cavity 1.

[0090] Examples of housing cavity 1 in various application scenarios.

[0091] Example 1:

[0092] In a supermarket setting, the container 1 contains dairy products. The container 1 is placed on the counter. Multiple container 1s are arranged in a row and fit together tightly. The opening of the first groove 2 faces the outside of the counter. The cross-section of the container 1 is square and the sidewall of the container 1 is a flat sidewall. Adjacent container 1s fit together tightly. More container 1s can be placed in the limited space of the counter.

[0093] The side wall of the receiving cavity 1 is recessed inward to form a first groove 2, and the handle 3 is set in the first groove 2 to form an embedded handle 3, which does not occupy the space outside the receiving cavity 1.

[0094] The first groove 2 is designed as an arc-shaped groove, which can minimize the space occupied by the receiving cavity 1. The surface of the arc-shaped groove is smoother. When the hand holds the handle 3, the fingers can be inserted into the first groove 2 without injuring the hand. Furthermore, when the hand holds the handle 3, the inner wall of the first groove 2 is kept at a similar distance, so that the inner wall of the first groove 2 fits relatively close to the hand.

[0095] The first groove 2 is elliptical in shape, with its major axis parallel to the height direction of the receiving cavity 1. The elliptical groove is positioned in the middle along the height direction of the receiving cavity 1, facilitating the grip of the handle 3. A hand-shaped groove that conforms to the back of the hand can also be provided on the inner wall of the arc-shaped groove, further reducing the space occupied inside the receiving cavity 1.

[0096] The handle 3 is provided with a grip surface 7, which is an S-shaped curved surface. When the hand grips the handle 3, the fingers fit in contact with the S-shaped curved surface, which can increase the friction with the handle 3 and improve the grip comfort.

[0097] The handle 3 has a cavity inside and is connected to the inner cavity of the receiving cavity 1 through a through hole. The cavity of the handle 3 can accommodate dairy products, maximizing the storage space of the container. Both ends of the handle 3 are provided with through holes that connect to the cavity, which facilitates the filling of dairy products in the receiving cavity 1 into the cavity and also facilitates the transfer of dairy products in the cavity to the inner cavity of the receiving cavity 1.

[0098] In the above application scenarios, the cavity 1 can also hold beverages such as juice, soda, and milk tea, as well as condiments such as soy sauce, sesame oil, vinegar, and oyster sauce; it can also hold toiletries such as shampoo, shower gel, and makeup remover.

[0099] Example 2:

[0100] In the transportation scenario, the receiving cavity 1 is transported by a transport vehicle. A van is selected as the transport vehicle. During the process of placing the receiving cavity 1 in the van, multiple receiving cavities 1 are first arranged in a row, the same as the arrangement in the supermarket scenario mentioned above, and then another row is placed on top of the first row of receiving cavities 1.

[0101] The bottom of the receiving cavity 1 is provided with a second groove 6, and the opening is located at the top of the receiving cavity 1. The second groove 6 is adapted to the cover. The cover covers the entire connecting pipe 4, forming a wrap around the connecting pipe 4. The cover can be inserted into the second groove 6, and the cover of the lower receiving cavity 1 is inserted into the second groove 6 of the upper receiving cavity 1. This allows the upper and lower receiving cavities 1 to fit tightly, reducing space waste and improving space utilization. With a fixed height of the van, more receiving cavities 1 can be accommodated.

[0102] The side of the handle 3 facing away from the first groove 2 is flush with the side where it is located, which can maximize the space between the grip surface 7 and the bottom of the first groove 2, while ensuring that the handle 3 does not occupy the space outside the receiving cavity 1.

[0103] Multiple rows of accommodating cavities 1 are stacked along their height to form one side, filling the entire van in the same way. In the longitudinal direction, the cover of the lower accommodating cavity 1 is inserted into the second groove 6 of the upper accommodating cavity 1. In the transverse direction, the handle 3 is embedded in the first groove 2, which can save space to the maximum extent and increase the carrying capacity of the van.

[0104] Example 3:

[0105] In a scenario where multiple receiving cavities 1 are transported to a van via a flatbed truck, the multiple receiving cavities 1 are placed on the flatbed truck with their height parallel to the flatbed of the truck and their handles 3 facing away from the truck, making it easier for workers to lift the receiving cavities 1.

[0106] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended application.

Claims

1. A container, characterized in that, include: The cavity (1) is provided with an opening, and the side wall of the cavity (1) is recessed inward to form a first groove (2); A handle (3) is located in the first groove (2), and the handle (3) is connected to the inner wall of the first groove (2); A cover that seals the opening.

2. The container according to claim 1, characterized in that, The first groove (2) is configured as an arc-shaped groove.

3. The container according to claim 1, characterized in that, The edge of the opening protrudes along the height direction of the receiving cavity (1) to form a connecting pipe (4), and the cover is sealed to the end of the connecting pipe (4).

4. The container according to claim 3, characterized in that, The outer wall of the connecting pipe (4) is provided with a first thread (5), and the cover is provided with a second thread that is adapted to the first thread (5). The cover is threadedly connected to the connecting pipe (4).

5. The container according to claim 4, characterized in that, The bottom of the receiving cavity (1) is provided with a second groove (6), and the opening is provided at the top of the receiving cavity (1). The second groove (6) is adapted to the cover.

6. The container according to claim 1, characterized in that, The cross-section of the accommodating cavity (1) is a regular polygon.

7. The container according to claim 6, characterized in that, The accommodating cavity (1) is provided with a plurality of planar sidewalls on its periphery, and the first groove (2) is provided on one of the planar sidewalls.

8. The container according to any one of claims 1 to 7, characterized in that, The handle (3) is a columnar structure and is arranged along the height direction of the receiving cavity (1).

9. The container according to any one of claims 1 to 7, characterized in that, The side of the handle (3) facing the bottom of the first groove (2) is set as a gripping surface (7), and the gripping surface (7) is set as an S-shaped curved surface along the height direction of the receiving cavity (1) to fit the fingers.

10. The container according to any one of claims 1 to 7, characterized in that, The handle (3) has a cavity, and the cavity has at least one through hole, which communicates with the inner cavity of the receiving cavity (1).