Which packaging innovation, developed for U.S. troops during WWII, revolutionized military logistics and later became standard in civilian food packaging?

Throughout military history, packaging design for rations and supplies has been critical to battlefield success. From ancient civilizations to modern armies, the way military provisions were packaged reflected not only technological capabilities but strategic priorities. This poll tests your knowledge about a revolutionary packaging innovation from World War II that changed how soldiers were supplied in combat conditions and influenced civilian packaging design for decades afterward.

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K-Rations in waterproof waxed cardboard boxes
SPAM in vacuum-sealed tin containers
The DUKW amphibious packaging system
The P-38 pocket can opener packaged with canned rations