Which of these everyday retail products was originally developed during WWII specifically for military use before becoming a commercial success?

Throughout military history, many common products we use today were initially developed for military applications before finding their way into civilian life. This trivia question explores one such innovation that transformed both warfare and everyday retail. Test your knowledge about how military necessity drove product development that later revolutionized civilian commerce!

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Duct tape (developed by Johnson & Johnson as a waterproof sealing tape for ammunition cases)
Tupperware containers (developed to store and preserve field rations in various climates)
Ziplock bags (created for securing classified documents in humid Pacific theaters)
Aluminum foil (invented to wrap artillery shells before being repurposed for food storage)