There is provided a container (1) for medical use forming a closed compartment (17) for carrying a liquid. The container (1) comprises a flexible side wall (5), a rigid top portion (4) and a rigid bottom portion (3). In the top portion (4) there is at least one through-hole. The side wall (5), the top (4) and bottom (3) portions together form a compartment (17). Inside the compartment (17), a flexible tube (5) is arranged with one end (21) in fluid communication with a though-hole (12) in the top portion (4). A second end (19) of the tube is connected to the bottom portion (3) via a snap-in connection (18). Liquid from the inside of the container (1) may be withdrawn by pressurizing the compartment (17) in which liquid is stored, when in use. The container (1) is reversible folded and unfolded for convenient filling and storing of the container (1). The container (1) is adapted for use in an irrigation system, and preferably a system for rectal irrigation.