Which packaging innovation from the 1960s revolutionized retail by allowing customers to see products before purchase, significantly reducing theft while increasing sales?

In the evolving world of retail, packaging design has played a crucial role in product success throughout history. Beyond mere protection, packaging has transformed into a strategic marketing tool that communicates brand values, captures consumer attention, and sometimes becomes more iconic than the product itself. Test your knowledge about a groundbreaking historical packaging innovation that forever changed consumer behavior and retail strategy.

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The blister pack (transparent plastic packaging sealed to a backing card)
The aerosol spray can with plastic cap
The tetra pak carton for liquids
The zip-lock resealable plastic bag