Pressurized container providing for the separate storage of a plurality of materials

Claim 1

A container arrangement for separately storing a first liquid material and a second material in a container and providing for the automatic admixing of the first and second materials upon opening of the container, comprising, a container, having a flat top container wall, containing said first liquid material at superatmospheric pressure, with the pressure surrounding said container being atmospheric, said flat top container wall having a weakened portion defining a dispensing orifice along which the container is adapted to be opened by pressing the weakened portion into the container, a separate closed compartment, defined by closure walls, arranged within said container and filled with said second material at superatmospheric pressure which is equal to or less than the superatmospheric pressure in the container, said separate compartment being cup shaped with a planar open end which is releasably attached to a flat inner surface of said flat top container wall such that the flat inner surface of said container top wall forms a closure for said planar open end of the cup shaped compartment, such that the releasably attached compartment is released and detached from the inner surface of said flat top container wall responsive to the difference in pressure across the closure walls of the closed compartment caused by the superatmospheric pressure within the compartment and the lower pressure in the container, when the pressure in the container drops from superatmospheric pressure to atmospheric pressure upon opening of the container to atmospheric pressure, with said difference in pressure resulting in a sufficient force on said compartment closure walls to cause detachment of the compartment from the flat inner surface of the container, thereby allowing the first liquid material and the second material to admix through said planar open end of the compartment, and said cup shaped compartment extending at least partly beneath said weakened portion of the top container wall, such that the opening of the top closure by pressing the weakened portion into the container further ensures that the compartment is detached from the top surface of the container.