Which packaging innovation, introduced in the 1950s, revolutionized grocery shopping by enabling self-service retail and is credited with changing American shopping habits?

The evolution of product packaging throughout history has dramatically influenced consumer behavior and retail strategies. From simple protective wrappings to sophisticated marketing tools, packaging innovations have transformed how products are sold, preserved, and perceived. This trivia question explores a pivotal moment in packaging history that revolutionized the retail industry and changed consumer shopping habits forever.

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Cardboard cereal boxes with character mascots
Aluminum beverage cans with pull tabs
Cellophane-windowed packaging for visibility
The printed barcode system for automated checkout