Which innovative packaging technology was specifically developed during WWII to protect military equipment, and is now considered a landmark achievement in product preservation history?

Military equipment and supplies have always required specialized packaging to ensure they reach troops in usable condition. Throughout history, innovations in product packaging have been developed specifically for military applications, often later influencing civilian packaging methods. This trivia question explores an important packaging development from World War II that revolutionized how military supplies were transported and preserved.

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Vacuum-sealed aluminum foil packaging
MRE (Meals Ready-to-Eat) retort pouches
Military-specification waterproof packaging tape
Volatile Corrosion Inhibitor (VCI) paper for preventing weapon rust