Which packaging innovation was specifically developed during WWII to protect military supplies being airdropped to troops and resistance fighters?

Throughout military history, packaging design has played a crucial but often overlooked role in warfare. From ancient methods of preserving rations to modern-day protective casings for sensitive equipment, the evolution of military packaging reflects both technological advancement and strategic necessity. This poll tests your knowledge of how military forces have developed specialized packaging solutions to meet the challenges of different combat environments and historical periods.

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The K-Ration waxed cardboard box
The cushioned equipment container (CEC)
The Griswold container (modified metal drum with parachute harness)
The hermetically sealed ammunition can