Which packaging innovation was initially developed by the military before becoming a consumer product revolution that dramatically extended food shelf life?

Throughout history, packaging innovations have revolutionized how we store, transport, and consume products. One particular invention dramatically transformed food preservation and accessibility worldwide, changing both consumer behavior and reducing food waste. This poll tests your knowledge about a pivotal packaging development that many of us interact with daily but rarely consider its groundbreaking origins.

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Retort pouches (flexible packaging that can withstand thermal processing)
Aerosol spray cans (pressurized dispensing system)
Tetra Pak cartons (aseptic packaging technology)
Vacuum-sealed plastic containers (oxygen-barrier technology)