Which packaging innovation was initially rejected by consumers due to its 'unnatural' appearance, but later became ubiquitous after a marketing campaign titled 'Ziploc: Yellow and Blue Make Green'?

Packaging design is more than just aesthetics—it's a critical innovation that has transformed how products are preserved, transported, and marketed. Some packaging breakthroughs have revolutionized entire industries and consumer behaviors. This poll tests your knowledge about a groundbreaking packaging invention that dramatically altered retail landscape and consumer convenience. Can you identify the revolutionary packaging innovation from its unique history?

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Resealable Ziploc storage bags (introduced 1968)
Tetrapak aseptic packaging (introduced 1961)
Aerosol spray cans with propellant (introduced 1949)
Ring-pull aluminum cans (introduced 1959)