Which 1960s packaging innovation was initially considered a failure but later revolutionized beverage distribution and is now considered one of the most important packaging developments in history?

Before modern packaging innovations, products were often sold in bulk and packaged at the point of sale. The evolution of product packaging has dramatically changed how goods are marketed, preserved, and transported throughout history. This poll tests your knowledge of a pivotal moment in packaging history that transformed consumer goods forever.

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The pull-tab aluminum can (developed by Ermal Fraze)
The ring-pull plastic milk bottle (developed by Consolidated Container Company)
The 'two-liter' PET plastic bottle (developed by Nathaniel Wyeth for Pepsi)
The aseptic juice box carton (developed by Ruben Rausing's Tetra Pak)