Which packaging innovation from the 1950s revolutionized retail by allowing consumers to see products before purchase and is credited with enabling the rise of self-service shopping?

Throughout history, product packaging has evolved dramatically, not just in materials but in its fundamental purpose. From simple protective wrappings to sophisticated marketing tools, packaging tells the story of industrial development, consumer culture, and technological innovation. This trivia question explores a pivotal moment in packaging history that changed how products were sold and consumed worldwide.

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Blister packaging (transparent plastic sealed to cardboard)
Tin cans with lithographed labels
Waxed cardboard milk cartons
Corrugated shipping boxes with brand logos