Which packaging innovation, patented in 1810, was initially developed for Napoleon's army and revolutionized food preservation before the era of refrigeration?

Before modern packaging innovations, product preservation and distribution posed significant challenges throughout history. The evolution of packaging technologies has dramatically shaped commerce, consumption patterns, and even societal development. This trivia question explores a pivotal packaging innovation that fundamentally transformed the food industry and military logistics, changing how products were preserved and distributed across the globe.

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The tin can (appertisation process)
Vacuum-sealed glass jars
Wax-sealed paper cartons
Collapsible metal tubes