Vacuum sealable container for hydratable products

Claim 1

A CONTAINER FOR USE IN PACKAGING AND HYDRATING A LIQUID COMBINABLE PRODUCT COMPRISING, AN ELONGATE TUBULAR BODY PORTION OF AIR AND MOISTURE-IMPERVIOUS PACKAGING MATERIAL, END CLOSURES OF SIMILAR PACKAGING MATERIAL JOINED TO SAID BODY PORTION TO DEFINE THEREWITH A VACUUM SEALED ENCLOSURE, ONE OF SAID END CLOSURES BEING FORMED WITH MEANS MANUALLY ACTUABLE TO RUPTURE THE MATERIAL OF SAID ONE END CLOSURE AT A DISCRETE AREA THEREOF, AND MEANS DISPOSED IN SEALING RELATION TO SAID DISCRETE AREA FOR MAINTAINING A VACUUM SEAL FOR SAID CONTAINER AFTER THE SAID ONE END CLOSURE IS RUPTURED BY SAID MANUALLY ACTUABLE MEANS, SAID VACUUM MAINTAINING MEANS INCLUDING A SUBSTANCE PHYSICALLY CHANGEABLE TO A NONSEALING STATE WHEN IN CONTACT WITH A PRODUCT HYDRATING LIQUID TO PERMIT ADMITTANCE OF SAID LIQUID INTO SAID CONTAINER WHEN SAID ONE END CLOSURE, AFTER BEING RUPTURED, IS PLACED IN FLUID-TIGHT COMMUNICATION WITH SAID LIQUID.