Which of these revolutionary packaging innovations was invented FIRST, fundamentally changing how products were sold and consumed?

Test your knowledge about groundbreaking innovations in product packaging that transformed industries and consumer experiences. Throughout history, packaging innovations have not only protected products but also revolutionized convenience, sustainability, and brand experiences. Some packaging inventions have been so impactful that they changed entire industries and consumer behaviors. Can you identify which breakthrough packaging innovation came first and set the stage for modern packaging practices?

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Tetrapak's aseptic carton packaging (enabling shelf-stable milk without refrigeration)
Aerosol spray can with propellant (allowing pressurized dispensing of products)
Gable-top milk carton (replacing milk bottles with foldable paperboard)
Child-proof pharmaceutical packaging (with push-and-turn safety mechanisms)