Which retail packaging innovation, developed during WWII, revolutionized military supply chains and later became a standard in civilian retail?

Throughout military history, certain retail innovations have dramatically transformed how armies are supplied and equipped. From Napoleon's famous quote that 'an army marches on its stomach' to modern logistics systems, the evolution of military supply chains represents a fascinating intersection of retail principles and warfare. This poll tests your knowledge of a revolutionary product innovation that fundamentally changed how militaries approached supply and distribution during a critical period in history.

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K-Rations in waxed paperboard boxes
Standardized shipping pallets and forklifts
Vacuum-sealed canned goods
Corrugated cardboard ammunition crates