Which packaging innovation, first commercially introduced in the 1950s, revolutionized retail by dramatically extending product shelf life and enabling self-service shopping?

The history of retail has been shaped by key innovations in packaging design. One particular packaging breakthrough in the 20th century revolutionized consumer behavior, transformed supply chain logistics, and fundamentally changed how products were marketed and sold. This innovation allowed products to remain fresher longer, reduced waste, and gave birth to entirely new retail categories. Test your knowledge of this pivotal moment in retail history!

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Vacuum-sealed aluminum cans
Polyethylene terephthalate (PET) bottles
Aseptic packaging (Tetra Pak)
Aerosol spray containers