Which World War II packaging innovation was specifically designed to prevent water damage to ammunition and is now considered one of military history's most significant packaging breakthroughs?

During World War II, military product packaging underwent revolutionary changes that still influence modern packaging design. From K-rations to specialized ammunition containers, these innovations balanced functionality, durability, and ease of use in extreme conditions. Some packaging designs were so successful they transitioned into civilian use after the war. Test your knowledge about a groundbreaking military packaging innovation that changed battlefield logistics forever.

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The Waterproof M1 Ammunition Box (a waxed cardboard container that disintegrated when wet)
The Hermetically Sealed C-Ration Can (primarily used for food preservation)
The M13 Ammunition Box (a metal container with rubber gaskets and latch system)
The Canvas Ammunition Pouch (a treated fabric container with drawstring closure)