Abstract: A system for confining articles in a container includes a flexible air impermeable membrane that is adapted to overlie articles in the container and can be pneumatically and forcefully draped over the articles in the container to hold them in place. In the preferred embodiments of the invention, the membrane is in the form of an enclosed bladder which can either be inflated against the articles in the container or drawn against the articles by a vacuum drawn around the bladder. Pour spouts and pressure dispensing spouts are also disclosed for use in certain embodiment of the invention whereby liquids can be confined in the bladder and dispensed at either ambient pressures or elevated pressures. The bladder further defines means by which a coolant can be placed in the container and retained in a segregated relationship relative to the other articles in the container.