Cylindrical collapsible container

1. A container ( 1 ) for medical use forming a closed compartment ( 17 ) for carrying a liquid, comprising:

a side wall member ( 2 ) formed by a sheet material and forming a side wall of said closed compartment ( 17 ), said side wall member ( 2 ) comprising oppositely arranged first ( 10 ) and second ( 11 ) open ends;

a rigid bottom portion ( 3 ) arranged at said first open end ( 10 ) of said side wall member ( 2 ) such that said bottom portion ( 3 ) seals said first open end ( 10 ) of said side wall member ( 2 ), thereby forming a bottom of said closed compartment ( 17 );

a rigid top portion ( 4 ) arranged at said second open end ( 11 ) of said side wall member ( 2 ) such that said top portion ( 4 ) seals said second open end ( 11 ) of said side wall member ( 2 ), said top portion ( 4 ) forming the top of said container ( 1 ), and having a first through going hole and a lid ( 7 ) pivotably connected to said top portion ( 4 ) and arranged to cover and seal a filling hole ( 14 ), wherein said lid ( 7 ) arranged on said top portion ( 4 ) comprises a pressure valve ( 8 ) arranged and configured to hold a pressure of at least 150 mbar inside said container ( 1 ); and

a flexible tube ( 5 ) arranged inside said compartment ( 17 ), said tube ( 5 ) having a first end portion ( 19 ) and a second end portion ( 21 );

wherein, said first end portion ( 19 ) of said tube ( 5 ) is connected to said bottom portion ( 3 ), said first end portion ( 19 ) being provided with an opening towards said compartment ( 17 ), and said second end portion ( 21 ) is connected to said top portion ( 4 ) and in fluid communication with said first hole ( 12 ) of the rigid top portion ( 4 );

wherein said side wall member ( 2 ) is flexible such that said container ( 1 ) is reversibly foldable and unfoldable, thereby being arrangeable in a compact state, in which the rigid top and bottom ( 3 ) portions are arranged relatively closer to each other, and in an expanded state, in which the rigid top and bottom ( 3 ) portions are arranged relatively further apart, respectively.

2. The container ( 1 ) according to claim 1 , wherein a second through going hole ( 13 ) is arranged such that, when in use, liquid may pass through said tube ( 5 ) and said first hole ( 12 ) through a sealed connection between said tube ( 5 ) and said top portion ( 4 ), and such that if pressurized gas is supplied through said second hole ( 13 ), when in use, liquid from inside said compartment ( 17 ) will be provided through said tube ( 5 ) and through said first hole ( 12 ).

3. The container ( 1 ) according to claim 1 , wherein said flexible tube ( 5 ) is twisted, to curl up when said container ( 1 ) is brought to said compact state.

4. The container ( 1 ) according to claim 1 , further comprising at least one locking element to maintain said container ( 1 ) in said compact state.

5. The container ( 1 ) according to claim 1 , further comprising at least one handle ( 6 ) in said top portion ( 4 ) and/or in said bottom portion.

6. The container ( 1 ) according to claim 1 , wherein in said compact state, said top ( 4 ) and bottom portions ( 3 ) are in contact with each other.

7. The container ( 1 ) according to claim 1 , wherein in said compact state, said top ( 4 ) and bottom portions ( 3 ) are rotated relative each other compared to when in said expanded state.

8. The container ( 1 ) according to claim 1 , wherein in said compact state, said container ( 1 ) is less than ½ the height of the expanded state.

9. The container ( 1 ) according to claim 1 , wherein said side wall member ( 2 ) is cylindrical in the expanded state.

10. The container ( 1 ) according to claim 1 , wherein said container ( 1 ) is adapted for use in an irrigation system.

11. The container ( 1 ) according to claim 1 , wherein said tube ( 5 ) is attached to said bottom portion ( 3 ) via a snap-in connection ( 18 ).

12. An irrigation system, comprising a container in accordance with claim 1 .