Which packaging innovation from the 1950s revolutionized retail by extending product shelf life, enabling self-service shopping, and significantly reducing food waste?

Throughout history, packaging design has evolved dramatically, not just as a practical necessity but as a powerful marketing tool. One particular packaging innovation in the 20th century revolutionized consumer behavior, transformed retail logistics, and created entirely new product categories. This innovation fundamentally changed how goods were preserved, transported, and marketed. Test your knowledge of this pivotal moment in retail and packaging history!

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Vacuum-sealed tin cans
Aerosol spray containers
Flexible plastic packaging and shrink wrap
Tetrapak cartons