Which packaging innovation, first commercially introduced in Sweden in 1951, allowed for ambient storage of liquids without refrigeration or preservatives through its unique six-layer design?

Product packaging innovations have dramatically transformed how we preserve and consume goods. One particular invention revolutionized the beverage industry by extending shelf life and eliminating the need for preservatives. This breakthrough discovery changed not only how products are stored but also how they're manufactured, transported, and displayed in retail environments. Test your knowledge about this game-changing packaging technology that we now take for granted!

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Aseptic packaging (Tetra Pak)
Vacuum-sealed metal cans
PET plastic bottles with oxygen barriers
Bag-in-box containers