PURPOSE: To minimize air coming into contact with a remaining liquid by assembling compressing means capable of pushing to a collapsible container, changing the position of the compressing means upon pushing when a part of substances in a container is removed, reducing a formed space, and maintaining the compressing means at the previously determined position.

CONSTITUTION: A substance to be stored such as carbonic beverages is received in a collapsible container 1, which is received within a concave provided in a canister 5. A desired amount of a gas-containing liquid is drawn from opening 3 of the collapsible container 1, and a collar 6 is moved toward a lid 11 by a thread 7. The movement of the collar 6 is carried out by moving a disc 8 toward the lid 11 to partially collapse the container 1. When the remaining gas-containing liquid is taken out from the container 1, the collar 6 and the disc 8 move to proper positions, whereby a necessary amount of the container 1 is collapsed each time. The disc 8 is compressed in a state that the container 1 is at least partly collapsed and maintained at this state. Thus, the container 1 is maintained at a precise position and does not expand to trap air.