Which packaging innovation was first commercially introduced in 1963, revolutionizing food preservation by eliminating the need for refrigeration for many products?

Throughout history, packaging innovations have dramatically transformed how we preserve, transport, and consume products. One particular packaging breakthrough revolutionized food preservation in the 20th century, dramatically extending shelf life and changing consumer habits forever. This trivia question explores a key moment in packaging history that shaped modern product marketing and distribution.

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Retort pouches (flexible packaging that can withstand thermal processing)
Vacuum-sealed glass jars with twist-off lids
Nitrogen-flushed plastic containers
Wax-coated cardboard cartons