Which historical packaging innovation from the 1950s revolutionized retail by allowing customers to see products without opening packages and significantly reducing labor costs for retailers?

Before modern packaging became standardized, product containers and wrappings evolved dramatically throughout history, often reflecting broader social and economic trends. The development of packaging has influenced consumer behavior, marketing strategies, and even preservation techniques. Test your knowledge about a pivotal moment in retail packaging history that transformed how products were sold and consumed worldwide.

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Blister packaging (transparent plastic sealed to a cardboard backing)
Tin cans with key-wind opening mechanisms
Cardboard boxes with cellophane windows
Vacuum-sealed glass containers with metal lids