Which packaging invention, patented in 1952, revolutionized retail by enabling self-service displays and significantly extending product shelf life?

The evolution of packaging design has been a fascinating journey of innovation and problem-solving. Throughout history, inventors have created packaging solutions that not only protected products but also revolutionized consumer behavior, retail operations, and environmental sustainability. This trivia question explores a pivotal packaging invention that transformed how products are preserved and displayed in modern retail environments.

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