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

Throughout military history, packaging design has played a crucial role in battlefield success. From keeping rations fresh during extended campaigns to protecting vital ammunition from environmental damage, military packaging innovations have often led to advances in civilian packaging technology. This trivia question explores a revolutionary World War II packaging development that had significant impact both during and after the conflict.

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DUKW waterproof ammunition containers
K-ration waxed cardboard boxes
PLIOFILM waterproof rifle wrapping
PVDC-coated cellophane (later known as Saran Wrap)