Which historic packaging innovation, introduced in the 1950s, revolutionized the beverage industry and was initially met with consumer resistance due to its unfamiliar appearance?

Throughout history, product packaging has evolved dramatically, not just to protect goods but also to market them effectively. The 20th century saw particularly revolutionary changes in how products were packaged and presented to consumers. This trivia question focuses on a pivotal packaging innovation that transformed both product preservation and consumer convenience, ultimately changing shopping habits worldwide.

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The aluminum beverage can with pull-tab opener
The Tetra Pak cardboard carton
The PET plastic bottle
The twist-off metal bottle cap