Which consumer product, originally developed for military use in WWII, was successfully rebranded and marketed to civilians with the slogan "Keeps Food Fresh Like Magic" in the late 1940s?

During World War II, product innovation and military necessity converged in fascinating ways. Many everyday products we now take for granted were developed or repurposed for wartime use, then marketed to civilians after the conflict ended. This poll tests your knowledge of one particularly unusual marketing success story that emerged from military necessity and transformed into a household name through brilliant post-war advertising.

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Tupperware (originally developed to protect military equipment from moisture and chemicals)
Saran Wrap (originally created as a protective spray for fighter planes)
Reynolds Wrap aluminum foil (first used to wrap artillery shells and aircraft parts)
Ziploc bags (initially designed to store military maps and documents in humid Pacific conditions)