The invention relates to A bi-axially stretched breathable film comprising a polymeric mixture, said polymeric mixture comprising based on the total weight of the polymeric mixture\u2014at least 50% of at least one polyether block copolymer; and \u2014from 0. The inner and outer rim portions are conformed so as to interlock together and are adhesively bonded. A pouring port through which the liquid fed from the cylinder is poured into the container and a check valve on the pouring port to be opened by pressure of the liquid fed to the pouring port are also provided.