Which 1950s packaging innovation revolutionized retail by enabling self-service shopping and is credited with changing how consumers interact with products in stores?

Product packaging has evolved dramatically throughout history, influencing consumer behavior and retail strategies. From simple protective coverings to sophisticated marketing tools, packaging innovations have shaped how products are perceived, preserved, and promoted. This trivia question explores a pivotal moment in packaging history that fundamentally changed retail and consumer relationships with products.

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Cellophane wrapping for foods
Aerosol spray cans for personal products
Blister packaging for visibility and theft prevention
Styrofoam containers for takeaway meals