CN117775521A - Hollow double-layer bottle - Google Patents

Abstract

The invention discloses a hollow double-layer bottle, which comprises: the inner bottle comprises an inner bottle neck and an inner bottle body, and the inner bottle neck is connected and matched with the inner bottle body to jointly define a first cavity; the outer bottle cover is sleeved on the outer side of the inner bottle neck, and the outer bottle cover and the inner bottle neck are constructed into an integral forming piece; the outer bottle body is provided with an avoidance port, the inner bottle body extends into the outer bottle body through the avoidance port, and the free end of the outer bottle cover is connected with the outer bottle body to be matched with the outer bottle body and seal the second cavity. When the hollow double-layer bottle is produced, the inner bottle neck and the outer bottle cover are constructed into an integral forming part, after the inner bottle body stretches into the outer bottle body, the inner bottle body is fixedly connected with the outer bottle body through the outer bottle cover so as to be fixed in the outer bottle body.

Description

Hollow double-layer bottle

Technical Field

The invention relates to the field of containers, in particular to a hollow double-layer bottle.

Background

In the related art, in the process of manufacturing the existing hollow double-layer bottle, the outer side of the inner bottle is sleeved with the outer bottle, the inner bottle and the outer bottle are required to be produced independently, and then the inner bottle is placed into the outer bottle and then is fixedly connected with the outer bottle through the connecting part. The connecting parts for connecting the outer bottle and the inner bottle are more, and the production process of the hollow double-layer bottle is complicated, so that a great deal of labor cost is required for producing the hollow double-layer bottle, and the connecting parts are manufactured and formed in additional processes, so that the processing time of the hollow double-layer bottle is further prolonged.

Disclosure of Invention

In order to reduce the degree of difficulty of assembly cavity bilayer bottle, reduce the cost of labor of production cavity bilayer bottle, reduce the time of production cavity bilayer bottle, this application provides a cavity bilayer bottle.

The application provides a cavity double-deck bottle adopts following technical scheme:

a hollow double-layered bottle comprising: the inner bottle comprises an inner bottle neck and an inner bottle body, the inner bottle neck is connected and matched with the inner bottle body to jointly define a first cavity, and a bottle opening is formed in one end, away from the inner bottle body, of the inner bottle neck; the outer bottle cover is sleeved on the outer side of the inner bottle neck, extends towards the direction away from the inner bottle neck along the radial direction of the hollow double-layer bottle, and is constructed as an integral part with the inner bottle neck; the outer bottle body, the second cavity is defined to outer bottle body, outer bottle body has dodges the mouth, interior bottle body passes through dodge mouthful stretch into in the outer bottle body, just interior bottle body's peripheral wall with the interior perisporium of outer bottle body is spaced apart to be set up, the free end of outer bottle cover is connected the cooperation with outer bottle body and is sealed the second cavity.

Through adopting above-mentioned technical scheme, when producing hollow double-deck bottle, interior bottleneck and outer bottle cover structure are integrated into one piece spare, after interior bottle stretches into outer bottle, through outer bottle cover and outer bottle fixed connection so that interior bottle is fixed in the outer bottle, compare with prior art, reduced the quantity that is used for connecting the connecting piece of interior bottle and outer bottle, can reduce the degree of difficulty of assembly cavity double-deck bottle to can reduce the cost of labor of production cavity double-deck bottle, can also reduce the time of production cavity double-deck bottle.

Preferably, one end of the outer bottle cover, which is close to the inner bottle neck, is lapped on the outer side of the inner bottle body.

Through adopting above-mentioned technical scheme, when the internal bottle shaping, the structure of outer bottle cover can be used for adjusting the structure of internal bottle to can make the structural shape of internal bottle satisfy the outward appearance requirement of cavity double-deck bottle.

Preferably, the outer bottle cover extends along the axial direction of the hollow double-layer bottle towards the direction away from the inner bottle neck.

Through adopting above-mentioned technical scheme, through constructing the outer bottle cover and setting up as along the axial direction orientation of cavity double-deck bottle and keeping away from the direction extension of interior bottleneck, can make the free end of outer bottle cover be close to outer bottle to the free end and the outer bottle connection cooperation of outer bottle cover of being convenient for can further reduce the connection degree of difficulty between outer bottle cover and the outer bottle, and then can further improve the assembly efficiency of cavity double-deck bottle.

Preferably, the free end of the outer bottle cover is provided with a plug-in groove, and the outer bottle body is plugged in the plug-in groove.

Through adopting above-mentioned technical scheme, through set up the jack groove at outer bottle cover, the connection arch is pegged graft the cooperation with the jack groove and can be positioned the relative position between outer bottle cover and the outer bottle to can make outer bottle cover and the accurate cooperation of outer bottle, and then can improve the product uniformity of cavity double-deck bottle.

Preferably, a sealing body is arranged in the inserting groove and is used for sealing a gap between the outer bottle cover and the outer bottle body, wherein the melting point of the outer bottle body and the melting point of the outer bottle cover are higher than those of the sealing body.

Through adopting above-mentioned technical scheme, through the sealing body in the heating grafting groove, the sealing body can make outer bottle and outer bottle cover bond together, and the clearance between outer bottle cover and the outer bottle can be sealed to the sealing body to can further seal the second cavity, also can prevent as far as possible that in-process outer bottle cover and the outer bottle separation of empty double-deck bottle in use.

Preferably, the inner bottle is blow-molded from an inner bottle blank, and the outer bottle cover and the inner bottle blank are injection molded and constructed as an integral molding piece before the inner bottle blank is inflated to form the inner bottle.

Through adopting above-mentioned technical scheme, with outer bottle cover and interior bottle base injection molding as integrated into one piece, reduced the time of respectively moulding plastics outer bottle cover and interior bottle base to after interior bottle is blown to interior bottle base formation, be connected interior bottle and outer bottle through outer bottle cover, reduce the quantity of the adapting unit that is used for connecting interior bottle and outer bottle, thereby reduce the assembly degree of difficulty of cavity double-deck bottle, improve the production efficiency of producing cavity double-deck bottle.

Preferably, when the inner bottle blank is inflated to form the inner bottle, a part of the inner bottle blank forming the inner bottle body is abutted against the outer bottle cover, so that the outer bottle cover is in lap joint with the inner bottle body, and a lap joint gap is formed between the outer bottle cover and the inner bottle body.

Through adopting above-mentioned technical scheme, the structure of interior bottle is limited through blowing mould and outer bottle cover cooperation, can increase the variety of cavity double-deck bottle structural shape. The overlap joint clearance forms between outer bottle cover and the interior bottle, and the overlap joint clearance can make between outer bottle cover and the interior bottle obviously separate, can avoid outer bottle cover and interior bottle to fuse together and lead to the heat preservation effect of cavity double-deck bottle to reduce.

Preferably, the hollow double-layered bottle further comprises: the bottle cap is arranged at the bottle mouth, the bottle cap is connected and matched with the inner bottle neck, and the outer bottle cover is positioned at the end part of the inner bottle neck away from the bottle cap.

By adopting the technical scheme, the bottle cap can be matched with the inner bottle neck to seal the bottle mouth so as to seal the first cavity, thereby preventing objects stored in the first cavity from flowing out through the bottle mouth as much as possible.

Preferably, the bottom wall of the inner bottle body is recessed towards the first cavity; the bottom wall of the outer bottle body is sunken towards the second cavity.

Through adopting above-mentioned technical scheme, through setting up the bottom of outer bottle into to the sunken structure in the second cavity, when the hollow double-deck bottle was placed on the support body of surface unevenness, so can reduce the area of contact of outer bottle and support body as far as possible to make the hollow double-deck bottle can erect and put on the support body reliably, the bottom of interior bottle is sunken in to first cavity, when interior bottle stretches into the second cavity, the bottom of outer bottle and the bottom pressure contact of interior bottle can be prevented as far as possible to this setting.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the hollow double-layer bottle is produced, the inner bottle neck and the outer bottle cover are constructed into an integral forming part, after the inner bottle body stretches into the outer bottle body, the inner bottle body is fixedly connected with the outer bottle body through the outer bottle cover so as to be fixed in the outer bottle body, compared with the prior art, the number of connecting pieces for connecting the inner bottle body and the outer bottle body is reduced, the difficulty in assembling the hollow double-layer bottle can be reduced, the labor cost for producing the hollow double-layer bottle can be reduced, and the time for producing the hollow double-layer bottle can be reduced;

2. when the inner bottle body is formed, the structure of the outer bottle cover can be used for adjusting the structure of the inner bottle body, so that the structural shape of the inner bottle body can meet the appearance requirement of the hollow double-layer bottle;

3. the outer bottle cover and the inner bottle blank are injection molded into the integrated part, so that the time for respectively injection molding the outer bottle cover and the inner bottle blank is reduced, and after the inner bottle blank is inflated to form an inner bottle, the inner bottle body is connected with the outer bottle body through the outer bottle cover, so that the number of connecting parts for connecting the inner bottle body and the outer bottle body is reduced, the assembly difficulty of the hollow double-layer bottle is reduced, and the production efficiency of producing the hollow double-layer bottle is improved.

Drawings

FIG. 1 is a schematic view of a hollow double-layer bottle according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a hollow double-layer bottle according to an embodiment of the present application;

FIG. 3 is a schematic view of an upper bottle portion according to an embodiment of the present application;

FIG. 4 is a cross-sectional view of an upper bottle section according to an embodiment of the present application;

FIG. 5 is a schematic view of a partial structure of a hollow double-layered bottle according to an embodiment of the present application;

fig. 6 is a cross-sectional view of a portion of the structure of a hollow double-layered bottle according to an embodiment of the present application.

Reference numerals illustrate:

1000. a hollow double-layer bottle; 100. an inner bottle; 10. an internal bottleneck; 11. an inner bottle body; 12. a bottle mouth; 13. a first cavity;

200. an outer bottle body; 20. an outer bottle cover; 21. a second cavity; 22. a plug-in groove; 23. an isolation chamber;

300. a bottle feeding part; 30. an inner bottle blank; 31. and (5) reversely buckling.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-6.

The embodiment of the application discloses a cavity bilayer bottle 1000, cavity bilayer bottle 1000 is used for storing the object, and cavity bilayer bottle 1000 can store solid and/or liquid for example, and cavity bilayer bottle 1000 constructs to bilayer structure, utilizes bilayer structure's design, can avoid the heat transfer to external environment in the bottle as far as possible to reach cavity bilayer bottle 1000 heat retaining effect.

Referring to fig. 1 to 6, the hollow double-layered bottle 1000 includes: the inner bottle 100, the outer bottle cap 20 and the outer bottle body 200, the inner bottle 100 includes an inner bottle neck 10 and an inner bottle body 11, and the inner bottle neck 10 is connected with the inner bottle body 11 to define a first cavity 13 together, the first cavity 13 being used for storing objects. Moreover, the inner bottle neck 10 is provided with a bottle mouth 12 at one end far away from the inner bottle body 11 (i.e. the upper end of the inner bottle neck 10 in fig. 1), the outer bottle cover 20 is sleeved on the outer side of the inner bottle neck 10, the outer bottle cover 20 extends along the radial direction of the hollow double-layer bottle 1000 towards the direction far away from the inner bottle neck 10, the outer bottle cover 20 can partially shield the inner bottle body 11, and the outer bottle cover 20 does not interfere with the inner bottle neck 10. The outer cap 20 and the inner neck 10 are integrally formed together, that is, the outer cap 20 and the inner neck 10 can be integrally formed.

Further, the outer bottle 200 defines the second cavity 21, the outer bottle 200 has an avoiding opening, the avoiding opening is used for avoiding the inner bottle 11, the inner bottle 11 stretches into the outer bottle 200 through the avoiding opening, and the outer peripheral wall of the inner bottle 11 is arranged at intervals with the inner peripheral wall of the outer bottle 200, specifically, the outer peripheral wall of the inner bottle 11 is arranged at intervals with the inner peripheral wall of the outer bottle 200, and due to different heat conduction capacities of heat on different heat conduction medium surfaces, the heat conduction between the outer peripheral wall of the inner bottle 11 and the inner peripheral wall of the outer bottle 200 can be blocked by the gas between the outer peripheral wall of the inner bottle 11 and the inner peripheral wall of the outer bottle 200, so that the temperature of an object stored in the first cavity 13 can be reduced and influenced by the external environment temperature, and the heat preservation effect of the hollow double-layer bottle 1000 can be achieved.

Further, the outer bottom wall of the inner bottle 11 is spaced apart from the inner bottom wall of the outer bottle 200, and the gas between the outer bottom wall of the inner bottle 11 and the bottom wall of the outer bottle 200 can prevent heat from being conducted between the inner bottle 11 and the outer bottle 200, so that the damage of the support contacting the bottom wall of the outer bottle 200 due to the excessive temperature of the bottom wall of the outer bottle 200 after the heat of the inner bottle 11 is transferred to the outer bottle 200 can be prevented as much as possible.

Meanwhile, the free end of the outer bottle cap 20 is connected to the outer bottle body 200, and the outer bottle cap 20 is used for sealing the second cavity 21, and it should be noted that the free end of the outer bottle cap 20 refers to the end of the outer bottle cap 20 far away from the inner bottle neck 10, and the outer bottle cap 20 can reliably and fixedly connect the inner bottle 100 with the outer bottle body 200. And a gas (such as argon or helium) with low heat conduction capability can be introduced into the second cavity 21, so that heat in the inner bottle 11 can be further prevented from being transferred to the outer bottle 200.

Therefore, when the hollow double-layer bottle 1000 is produced, the inner bottle neck 10 and the outer bottle cover 20 are constructed as an integral molding piece, after the inner bottle body 11 stretches into the outer bottle body 200, the inner bottle body 11 is fixedly connected with the outer bottle body 200 through the outer bottle cover 20 so as to be fixed in the outer bottle body 200, compared with the prior art, the inner bottle neck 10 is indirectly connected with the outer bottle body 200 through the outer bottle cover 20, the outer bottle cover 20 can serve as a connecting part between the inner bottle neck 10 and the outer bottle body 200, and the inner bottle neck 10 and the outer bottle cover 20 are not required to be connected by using an additional connecting part, so that the number of connecting pieces for connecting the inner bottle body 11 and the outer bottle body 200 is reduced, the difficulty in assembling the hollow double-layer bottle 1000 can be reduced, the labor cost for producing the hollow double-layer bottle 1000 can be reduced, and the time for producing the hollow double-layer bottle 1000 can be reduced.

Referring to fig. 1 and 2, in some embodiments of the present application, an end of the outer bottle cover 20, which is close to the inner bottle neck 10, is overlapped on the outer side of the inner bottle body 11, specifically, a part of the structure of the inner bottle body 11, which is close to the end of the inner bottle neck 10, is in contact with the outer bottle cover 20, and a contact portion between the inner bottle body 11 and the outer bottle cover 20 forms a reverse buckle 31, and when the inner bottle body 11 is formed, the structure of the outer bottle cover 20 can be used for adjusting the structure of the inner bottle body 11, so that the structural shape of the inner bottle body 11 can meet the appearance requirement of the hollow double-layer bottle 1000.

Referring to fig. 2, in some embodiments of the present application, the outer bottle cover 20 extends along the axial direction of the hollow double-layer bottle 1000 in a direction away from the inner bottle neck 10, and it should be noted that, the axial direction of the hollow double-layer bottle 1000 may be the up-down direction in fig. 1, and by configuring the outer bottle cover 20 to extend along the axial direction of the hollow double-layer bottle 1000 in a direction away from the inner bottle neck 10, the free end of the outer bottle cover 20 may be closer to the outer bottle body 200, so that the free end of the outer bottle cover 20 is convenient to be connected and matched with the outer bottle body 200, so as to further reduce the connection difficulty between the outer bottle cover 20 and the outer bottle body 200, and further improve the assembly efficiency of the hollow double-layer bottle 1000.

Referring to fig. 2, in some embodiments of the present application, a free end of the outer bottle cover 20 is provided with an insertion groove 22, the outer bottle body 200 is inserted into the insertion groove 22, specifically, a connection protrusion is disposed at an avoidance port of the outer bottle body 200, in some specific embodiments, the connection protrusion may extend along a circumferential direction of the outer bottle body 200 to form an annular structure, and the connection protrusion of the outer bottle body 200 may be inserted into the insertion groove 22, and by setting the insertion groove 22 in the outer bottle cover 20, the connection protrusion and the insertion groove 22 are in insertion fit with each other, so that a relative position between the outer bottle cover 20 and the outer bottle body 200 may be located, thereby enabling the outer bottle cover 20 and the outer bottle body 200 to be precisely matched, and further improving product consistency of the hollow double-layer bottle 1000.

Referring to fig. 2, in some embodiments of the present application, a sealing body is disposed in the plugging slot 22, the sealing body is used for sealing a gap between the outer bottle cover 20 and the outer bottle, the sealing body may be formed by cooling a sealant, the melting point of the outer bottle body 200 and the melting point of the outer bottle cover 20 are both higher than the melting point of the sealing body, after the outer bottle body 200 is connected and matched with the outer bottle cover 20, the sealing body can bond the outer bottle body 200 and the outer bottle cover 20 together by heating the sealing body in the plugging slot 22, and the sealing body can seal the gap between the outer bottle cover 20 and the outer bottle body 200, so as to further seal the second cavity 21, and also prevent the outer bottle cover 20 from being separated from the outer bottle body 200 in the process of using the hollow double-layer bottle 1000 as much as possible. Further, when the outer bottle body 200 or the inner bottle 100 is damaged and needs to be replaced, the sealing body can be melted by heating the joint between the outer bottle cover 20 and the outer bottle body 200, so that the outer bottle cover 20 is separated from the outer bottle body 200.

Referring to fig. 3, in some embodiments of the present application, the inner bottle 100 is blow molded from the inner bottle preform 30, and before the inner bottle preform 30 is inflated to form the inner bottle 100, the outer bottle cap 20 and the inner bottle preform 30 are both injection molded and configured as an integral molding member, and it may also be understood that the outer bottle cap 20 and the inner bottle preform 30 are injection molded integrally and form the upper bottle portion 300, by injection molding the outer bottle cap 20 and the inner bottle preform 30 as an integral molding member, the processing time required for respectively injection molding the outer bottle cap 20 and the inner bottle preform 30 may be reduced, and after the inner bottle preform 30 is inflated to form the inner bottle 100, the inner bottle 11 and the outer bottle body 200 are connected through the outer bottle cap 20, so that the number of connecting members for connecting the inner bottle 11 and the outer bottle body 200 is reduced, thereby reducing the assembly difficulty of the hollow double-layered bottle 1000 and improving the production efficiency of the hollow double-layered bottle 1000.

Referring to fig. 2 to 6, in some embodiments of the present application, when the inner bottle preform 30 is inflated to form the inner bottle body 11, a portion of the inner bottle preform 30 forming the inner bottle body 11 is abutted against the outer bottle cap 20, so that the outer bottle cap 20 is in lap joint with the inner bottle body 11, specifically, when the inner bottle preform 30 is inflated to form the inner bottle 100, the volume of the inner bottle preform 30 is gradually increased, and a portion of the inner bottle preform 30 forming the inner bottle body 11 is abutted against the outer bottle cap 20, and due to the shape fixation of the outer bottle cap 20, the inner bottle preform 30 can be expanded along the inner wall surface of the outer bottle cap 20, thereby realizing the technical effect that the outer bottle cap 20 limits the structural shape of the inner bottle body 11, and realizing the technical effect that the outer bottle cap 20 is in lap joint with the inner bottle body 11.

The structure of the inner bottle body 11 is defined by the cooperation of the blow mold and the outer bottle cap 20, so that the variety of the structure shape of the hollow double-layered bottle 1000 can be increased. The overlap joint clearance is formed between the outer bottle cover 20 and the inner bottle body 11, and the overlap joint clearance can obviously separate the outer bottle cover 20 from the inner bottle body 11, so that the heat preservation effect of the hollow double-layer bottle 1000 is prevented from being reduced due to the fact that the outer bottle cover 20 and the inner bottle body 11 are fused together.

Referring to fig. 2, in some embodiments of the present application, the hollow double-layer bottle 1000 further comprises: the bottle cap is arranged at the bottle mouth 12 and is connected and matched with the inner bottle neck 10, the outer bottle cover 20 is located at the end part of the inner bottle neck 10 away from the bottle cap, and the bottle cap can be matched with the inner bottle neck 10 to seal the bottle mouth 12 to seal the first cavity 13, so that objects stored in the first cavity 13 can be prevented from flowing out through the bottle mouth 12 as much as possible. Wherein, the outer periphery wall of the inner bottleneck 10 and the inner periphery wall of the bottle cap are both provided with screw thread structures, when the screw thread structures of the bottle cap are connected and matched with the screw thread structures of the inner bottleneck 10, the bottle cap can be connected with the inner bottleneck 10 in a sealing way, and certainly, the application is not limited to this, for example, the bottle cap and the inner bottleneck 10 can be connected and matched in a plastic package way. Further, the bottle cap and the inner neck 10 are made of different materials, so that the bottle cap and the inner neck 10 are prevented from being adhered together due to long-term contact between the bottle cap and the inner neck 10.

Referring to fig. 2, in some embodiments of the present application, the bottom of the inner bottle 11 is recessed into the second cavity 21, and by setting the bottom of the outer bottle 200 to be a structure recessed into the second cavity 21, when the hollow double-layered bottle 1000 is placed on a support with uneven surface, the contact area between the outer bottle 200 and the support can be reduced as much as possible, so that the hollow double-layered bottle 1000 can be reliably placed upright on the support. The bottom of the inner bottle 11 is concave toward the first cavity 13, and when the inner bottle 11 extends into the second cavity 21, the bottom of the outer bottle 200 is prevented from being pressed against and contacted with the bottom of the inner bottle 11 as much as possible.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, construction and principle of the present application should be covered by the protection scope of the present application.

Claims (9)

1. A hollow double-layered bottle, comprising:

the inner bottle (100), the inner bottle (100) comprises an inner bottle neck (10) and an inner bottle body (11), the inner bottle neck (10) is connected and matched with the inner bottle body (11) to jointly define a first cavity (13), and one end, far away from the inner bottle body (11), of the inner bottle neck (10) is provided with a bottle mouth (12);

the outer bottle cover (20) is sleeved outside the inner bottle neck (10), the outer bottle cover (20) extends towards the direction away from the inner bottle neck (10) along the radial direction of the hollow double-layer bottle (1000), and the outer bottle cover (20) and the inner bottle neck (10) are constructed into an integral forming piece;

the outer bottle body (200), second cavity (21) is injectd to outer bottle body (200), outer bottle body (200) have dodges the mouth, interior bottle body (11) are passed through dodge mouthful stretch into in outer bottle body (200), just the periphery wall of interior bottle body (11) with the interval of the inner peripheral wall of outer bottle body (200) sets up, the free end of outer bottle cover (20) is connected cooperation and is sealed with outer bottle body (200) second cavity (21).

2. A hollow double-layered bottle according to claim 1, wherein the end of the outer cap (20) adjacent to the inner neck (10) is overlapped on the outer side of the inner bottle body (11).

3. A hollow double-layered bottle according to claim 2, characterized in that the outer cap (20) is arranged extending in the axial direction of the hollow double-layered bottle (1000) in a direction away from the inner neck (10).

4. A hollow double-layered bottle according to any of claims 1-3, characterized in that the free end of the outer bottle cap (20) is provided with a socket groove (22), and the outer bottle body (200) is inserted into the socket groove (22).

5. A hollow double-layered bottle according to claim 4, wherein a sealing body is provided in the insertion groove (22), the sealing body being used for sealing a gap between the outer bottle cap (20) and the outer bottle body (200), wherein the melting point of the outer bottle body (200) and the melting point of the outer bottle cap (20) are higher than the melting point of the sealing body.

6. A hollow double-layered bottle according to claim 2, wherein the inner bottle (100) is blow-molded from an inner preform (30), and the outer cap (20) and the inner preform (30) are injection-molded and constructed as an integral piece before the inner preform (30) is blow-molded to form the inner bottle (100).

7. A hollow double-layer bottle according to claim 6, wherein when the inner bottle blank (30) is inflated to form the inner bottle (100), a part of the inner bottle blank (30) forming the inner bottle body (11) is stopped against the outer bottle cover (20) so that the outer bottle cover (20) is in overlap fit with the inner bottle body (11), and an overlap gap is formed between the outer bottle cover (20) and the inner bottle body (11).

8. A hollow double-layered bottle as claimed in claim 1, further comprising: the bottle cap is arranged at the bottle opening (12), the bottle cap is connected and matched with the inner bottle neck (10), and the outer bottle cover (20) is positioned at the end part, far away from the bottle cap, of the inner bottle neck (10).

9. A hollow double-layered bottle according to claim 1, characterized in that the bottom wall of the inner bottle body (11) is recessed inwardly of the first cavity (13);

the bottom wall of the outer bottle body (200) is recessed towards the inside of the second cavity (21).