Patent ID: 8794487

Claim:
A composite container, comprising: a form-retaining outer container comprising a neck; at least one flexible inner container comprising a dispensing opening, said dispensing opening being mounted in the neck of the outer container, wherein the at least one inner container is connected over at least a part of its upper surface area to a corresponding upper surface area of the outer container, via an adhesive or weld connection, wherein a lower portion of the inner container is not connected to a side wall of the outer container, and is free to move upwards under a pressure, and wherein, in operation, in response to an overpressure developed by a displacing medium introduced between the portions of the inner container and the outer container that are not connected, said not connected portion of the inner container is pushed upwards in a piston type motion, so as to fold over the upper portion of the inner container, said upper portion of the inner container remaining connected to the outer container.