Which packaging innovation was specifically developed for D-Day in 1944 and later revolutionized civilian food preservation?

During major conflicts, military necessity has driven significant innovations in packaging that later influenced civilian products. From food preservation to equipment protection, military requirements have revolutionized how products are packaged, transported, and utilized in extreme conditions. Test your knowledge of these military-to-market packaging developments that changed both warfare and everyday life.

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DUKW waterproof containers (later adapted for Tupperware)
Paraffin-coated cardboard boxes (P-boxes)
PVDC-coated cellophane (precursor to Saran Wrap)
Aluminum foil ration packs (early version of TV dinners)