Closure system and kit

1 . A closure system for closing an opening of a container, comprising:

a stopper member made of an elastic material and having a plug portion configured to tightly fit into the opening of the container and a cover portion configured to abut a boundary surface adjacent to the opening of the container; and

a cage member made of a shape-retentive material, wherein the cage member has a stopper contacting section, a clipping structure and an intermediate section between the stopper contacting section and the clipping structure,

wherein the clipping structure of the cage member is configured to clip in a corresponding structure of the container,

wherein the cage member is configured such that the stopper contacting section of the cage member applies a pressure to the cover portion of the stopper member to push the cover portion of the stopper member onto the boundary surface of the opening of the container, when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container,

wherein the cover portion of the stopper member has a circumferential cage notch directed away from the boundary surface of the opening when the plug portion of the stopper member is fitted into the opening of the container,

wherein the cover portion of the stopper member has a circumferential container notch directed towards the boundary surface of the opening when the plug portion of the stopper member is fitted into the opening of the container,

wherein the circumferential cage notch of the cover portion of the stopper member is radially offset relative to the circumferential container notch of the cover portion of the stopper member, and

wherein the circumferential cage notch is disposed at a first radial position on the cover portion of the stopper member and the circumferential container notch is disposed at a second radial position on the cover portion at the stopper member, and wherein the circumferential cage notch is the only notch of the cover portion at the first radial position and the circumferential container notch is the only notch of the cover portion at the second radial position.

2 . The closure system of claim 1 , wherein the shape retentive material of the cage member is a metal.

3 . The closure system of claim 2 , wherein the intermediate section of the cage member is configured to surround a head portion of the container.

4 . The closure system of claim 1 , wherein the intermediate section of the cage member is cylindrical.

5 . The closure system of claim 4 , wherein the clipping structure of the cage member comprises a plurality of tongues.

6 . The closure system of claim 5 , wherein each of the plurality of tongues inwardly extends from the cylindrical intermediate section and the plurality of tongues is regularly distributed about the cylindrical intermediate section.

7 . The closure system of claim 5 , wherein each of the plurality of tongues of the clipping structure of the cage member is elastically movable relative to the intermediate section of the cage member.

8 . The closure system of claim 1 , wherein the stopper contacting section of the cage member comprises an aperture such that the cover portion of the stopper member is accessible through the aperture of the stopper contacting section when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

9 . The closure system of claim 8 , comprising a cover reversibly mountable to the stopper contacting section of the cage member to close the aperture of the stopper contacting section of the cage member.

10 . The closure system of claim 1 , wherein the cover portion of the stopper member has an edge section with a front face configured to abut the boundary surface of the opening of the container and a back face opposite to and corresponding to the front face of the edge section, wherein the stopper contacting section of the cage member is configured to abut the complete back face of the edge section of the stopper member when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

11 . The closure system of claim 1 , wherein the cage member is configured to end essentially adjacent to the clipping structure when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

12 . The closure system of claim 1 , wherein the force applied by the stopper contacting section of the cage member to the cover portion of the stopper member can be in a range from about 10 Newton to about to about 100 Newton.

13 . The closure system of claim 1 , wherein the cage member is configured such that the stopper contacting section of the cage member applies the pressure to the cover portion of the stopper member to compress the stopper member between the stopper contacting section of the cage member and the boundary surface of the container, when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

14 . The closure system of claim 1 , wherein the circumferential cage notch is disposed at a first radial position on the cover portion of the stopper member and the circumferential container notch is disposed at a second radial position on the cover portion at the stopper member, the second radial position being closer to a central axis of the closure system than the first radial position.

15 . The closure system of claim 1 , wherein the cover portion of the stopper member has exactly one circumferential cage notch and exactly one circumferential container notch.

16 . The closure system of claim 1 , wherein the intermediate section of the cage member is cylindrical, wherein the clipping structure of the cage member comprises a plurality of tongues.

17 . The closure system of claim 1 , wherein the stopper contacting section of the cage member comprises an aperture such that the cover portion of the stopper member is accessible through the aperture of the stopper contacting section when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

18 . The closure system of claim 1 , wherein the cage member is configured such that the stopper contacting section of the cage member applies the pressure to the cover portion of the stopper member to compress the stopper member between the stopper contacting section of the cage member and the boundary surface of the container, when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container.

19 . A closure system for closing an opening of a container, comprising:

a stopper member made of an elastic material and having a plug portion configured to tightly fit into the opening of the container and a cover portion configured to abut a boundary surface adjacent to the opening of the container; and

a cage member made of a shape-retentive material, wherein the cage member has a stopper contacting section, a clipping structure and an intermediate section between the stopper contacting section and the clipping structure,

wherein the clipping structure of the cage member is configured to clip in a corresponding structure of the container,

wherein the cage member is configured such that the stopper contacting section of the cage member applies a pressure to the cover portion of the stopper member to push the cover portion of the stopper member onto the boundary surface of the opening of the container, when the plug portion of the stopper member is fitted into the opening of the container and the clipping structure of the cage member clips in the corresponding structure of the container,

wherein the cover portion of the stopper member has a circumferential cage notch directed away from the boundary surface of the opening when the plug portion of the stopper member is fitted into the opening of the container, such that the cage notch of the cover portion of the stopper member collapses in dependence of a force applied on the stopper member when the stopper contact section of the cage member pushes the cover portion of the stopper member,

wherein the cover portion of the stopper member has a circumferential container notch directed towards the boundary surface of the opening when the plug portion of the stopper member is fitted into the opening of the container, such that the cage notch of the cover portion of the stopper member collapses in dependence of a force applied on the stopper member when the stopper contact section of the cage member pushes the cover portion of the stopper member, and

wherein the circumferential cage notch of the cover portion of the stopper member is radially offset relative to the circumferential container notch of the cover portion of the stopper member, and

wherein the circumferential cage notch is disposed at a first radial position on the cover portion of the stopper member and the circumferential container notch is disposed at a second radial position on the cover portion at the stopper member, and wherein the circumferential cage notch is the only notch of the cover portion at the first radial position and the circumferential container notch is the only notch of the cover portion at the second radial position.