Which packaging innovation, introduced in 1959, revolutionized retail by allowing consumers to see products before purchase and is credited with enabling the modern self-service shopping experience?

The history of product packaging reveals fascinating insights into economic, cultural, and technological developments throughout the centuries. From simple paper wrappings to sophisticated tamper-proof designs, packaging has evolved dramatically. This poll tests your knowledge about a groundbreaking packaging innovation that fundamentally changed the retail landscape and consumer behavior in the 20th century.

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Blister packaging (clear plastic bonded to cardboard backing)
Tetrapak aseptic carton (for preserving liquids without refrigeration)
Aerosol spray can with valve system
Vacuum-sealed tin canning