Which packaging innovation from the 1950s fundamentally changed retail by enabling self-service shopping and is credited with reducing food waste by over 30% when first introduced?

Throughout history, product packaging has evolved dramatically, not just in materials but in purpose and design philosophy. From ancient civilizations using natural materials like leaves and clay pots to today's sustainable innovations, packaging tells the story of human commerce and technological advancement. This trivia question explores a pivotal moment in packaging history that revolutionized consumer goods and retail strategies.

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Vacuum-sealed tin cans
Cellophane wrap
Styrofoam containers
TV dinner aluminum trays with compartments