Which of these sustainable packaging innovations was first patented in 1963 but didn't gain widespread adoption until environmental concerns grew in the 1990s?

The world of product packaging has evolved dramatically over the past century, with sustainability initiatives driving significant innovation. Some packaging breakthroughs have not only reduced environmental impact but have fundamentally altered consumer behavior and expectations. This trivia question focuses on a groundbreaking sustainable packaging innovation that transformed an entire industry and influenced how consumers interact with everyday products.

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Plant-based bioplastic bottles
The resealable cereal box liner
Concentrated laundry detergent in reduced packaging
The easy-open aluminum can tab that stays attached to prevent litter