Which packaging innovation was initially rejected by executives but later saved a failing product and created a billion-dollar market category?

Throughout history, packaging innovations have dramatically transformed product accessibility, freshness preservation, and consumer experience. Some packaging breakthroughs were so revolutionary they created entirely new market categories or saved failing products. This trivia challenges you to identify one of the most transformative packaging innovations that fundamentally altered an industry and consumer behavior worldwide.

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The resealable zipper on Ziploc bags
The pop-top can for beverages
The squeeze tube for toothpaste
The Tetra Pak aseptic packaging for shelf-stable milk and juices