Which packaging innovation did Coca-Cola initially resist, fearing it would harm their brand identity, before it became one of their most successful product decisions?

Test your knowledge about one of the most recognizable packaging innovations in consumer product history. This design revolutionized how people interact with everyday items and created an entirely new category of consumer behavior. The innovation perfectly balanced functionality, convenience, and brand recognition—elements that product designers still strive to achieve today. Can you identify the correct historical fact about this groundbreaking packaging design?

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The aluminum can (1963)
The plastic PET bottle (1978)
The six-pack ring carrier (1961)
The flip-top resealable cap (1985)