Self-cooled beverage container

Claim 1

A PACKAGE FOR AN EDIBLE OR PORTABLE COMMODITY, COMPRISING AN OUTER CONTAINER CLOSED AT THE TOP AND BOTTOM, THE TOP OF SAID OUTER CONTAINER HAVING MEANS FORMING AN OPENING THEREIN, A REMOVABLE CAP CLOSING SAID OPENING, ANOTHER CONTAINER, INSIDE THE OUTER CONTAINER AND SPACED INWARDLY THEREOF, SAID OTHER CONTAINER AND SPACED MODITY, A COMPARTMENT IN THE BOTTOM OF THE OUTER CONTAINER BELOW THE OTHER CONTAINER, SAID OUTER AND OTHER CONTAINERS AND COMPARTMENT DEFINING A CHAMBER AROUND THE OTHER CONTAINER, SAID CHAMBER BEING MAINTAINED UNDER A VACUUM, SAID COMPARTMENT CONTAINING A GASEOUS SUBSTANCE. OF A NATURE SUCH THAT ON EXPANSION IT HAS A REFRIGERATING EFFECT, SAID COMPARTMENT HAVING AN OPENING IN THE TOP THEREOF, A VACUUM RESPONSIVE VALVE DEVICE CLOSING SAID OPENING FOR FACILITATING INJECTION INTO SAID CHAMBER OF THE GASEOUS SUBSTANCE FROM THE COMPARTMENT, SAID OUTER CONTAINER HAVING AN AIR VENT TO OPEN SAID CHAMBER TO THE ATMOSPHERE WHEREUPON SAID VALVE IS ACTUATED TO RELEASE THE SUBSTANCE IN THE COMPARTMENT FOR FLOWING INTO THE CHAMBER, AROUND THE INNER CONTAINER AND OUT THROUGH THE AIR VENT WHEREUPON THE COMMODITY IN THE OTHER CONTAINER IS REFRIGERATED, A REMOVABLE PLUG SEALING SAID AIR VENT, AND MEANS IS COMMON FOR REMOVING THE PLUG AND FOR LATER REMOVING THE CLOSURE CAP.