Abstract: A hermetic cap for a container containing product packed in said container under vacuum. The cap has an orifice through it and a first frangible seal hermetically sealing the orifice on one surface of the cap and a second frangible seal hermetically sealing the orifice on an opposite surface of the cap.

Abstract: A process for packaging foodstuffs in substantially rigid containers. A desired quantity of foodstuff to be packaged is placed in the container, a quantity of aqueous liquid in an amount sufficient to generate, when boiled, a volume of vapor sufficiently in excess of the volume of the container to substantially completely displace all other gases from the container, is added. The container is closed but not sealed, so as to permit communication between the interior of the container and the ambient atmosphere. The container and its contents are warmed to a temperature sufficient to generate the volume of vapor when the container is subjected to a pressure lower than atmospheric pressure. The temperature is kept as low as possible so that no cooking of the foodstuffs occurs. After warming, the containers are exposed to a low pressure so that the liquid in the container boils. The boiling liquid generates vapor in the container sufficient to drive out and displace other gases from the container.