Which packaging innovation, first widely used during the Napoleonic Wars, revolutionized military logistics by allowing armies to carry preserved food for extended campaigns?

Throughout history, military product packaging has evolved dramatically to meet the unique challenges of warfare. From ancient preserved rations to modern MREs (Meals Ready to Eat), packaging innovations have directly impacted military effectiveness and strategy. This poll tests your knowledge about a revolutionary packaging development that changed how armies were supplied and significantly influenced major military campaigns.

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Tin canning (appertization)
Waxed paper wrapping
Ceramic vacuum sealing
Salt-packed wooden barrels