Abstract: A piston-shaped bottom closure for a hollow container has a closing member arranged so that when the closure is inserted into a container the closing member extends transversely of an inner wall of the container, a hollow guiding member extending from the closing member in an axial direction so that in the inserted condition of the closure the guiding member is guided by the inner wall of the container, at least one sealing lip provided on the guiding member and abutting against the inner wall of the container in the inserted condition of the closure, and a cover member arranged on the closing member at its side facing toward a storage chamber of the container and having a contour substantially corresponding to the contour of the closing member, wherein the cover is composed of a material having a different elasticity than the closing and guiding members and the sealing lip and is provided with an edge which extends towards the guiding member and overlaps an outer edge of the closing member so as to be arrest

Abstract: A dispensing receptacle has an internal chamber in which a piston is accommodated and separates the chamber into two compartments. The material to be dispensed is accommodated in one of the compartments which communicates with the exterior of the receptacle via a dispensing arrangement. A container with pressurized medium is accommodated in the other compartment and has a valve which, when actuated, releases a predetermined quantity of the pressurized medium into the other compartment so as to act on the piston and displace the same toward the dispensing arrangement with a concomitant dispensing of the material. An actuating arrangement is provided for actuating the valve of the pressurized medium container. A foil originally separates the one compartment from the dispensing arrangement, and the dispensing arrangement is provided with a cutting projection which perforates the foil so as to establish communication between the one compartment and the dispensing arrangement.