Which packaging innovation, invented in 1952, revolutionized retail by allowing products to be displayed hanging on racks and significantly reducing theft?

Product packaging has evolved tremendously over the decades, with certain inventions dramatically changing how products are preserved, marketed, and consumed. These packaging innovations have not only extended product shelf life but also transformed consumer shopping habits and retail experiences. Test your knowledge about a groundbreaking packaging technology that changed multiple industries!

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Blister packaging (plastic sealed to cardboard backing)
Tetra Pak (aseptic packaging for liquids)
Vacuum-sealed aluminum pouches
Shrink wrap technology