Which innovative packaging technology was invented by Swedish engineer Ruben Rausing in 1951, revolutionizing liquid food storage and creating an entirely new product category in retail?

Product packaging has evolved dramatically throughout history, with some innovations completely transforming how goods are sold, preserved, and transported. Behind many everyday packaging solutions we take for granted are fascinating stories of invention and discovery. This trivia question focuses on a packaging breakthrough that revolutionized retail by solving a critical problem and creating new possibilities for product distribution and marketing.

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Aseptic Tetra Pak cartons (allowing milk and juices to be stored without refrigeration)
Vacuum-sealed tin cans (extending shelf life of preserved foods)
Blister packaging (tamper-evident plastic packaging for pharmaceuticals)
Aerosol spray cans (pressurized containers for dispensing liquids)