Which packaging innovation was first introduced by Ermal Fraze in 1959, after he struggled to open a beverage at a picnic?

Packaging design has evolved dramatically over the decades, with certain innovations fundamentally changing how products are preserved, transported, and consumed. While many packaging solutions seem commonplace now, they were once groundbreaking inventions that solved significant problems. This trivia question explores an important packaging innovation that revolutionized both product freshness and consumer convenience.

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Pull-tab can opener
Twist-off bottle cap
Resealable zipper packaging
Vacuum-sealed jar lid