Which packaging innovation, introduced in the early 2000s, solved the 'last drop problem' and revolutionized how consumers use a common condiment?

The history of product packaging has seen numerous innovations aimed at solving consumer problems while reducing environmental impact. One breakthrough packaging design from the early 2000s revolutionized how we interact with a common household product, making it significantly more convenient while addressing a universal consumer frustration. Test your knowledge about this game-changing packaging innovation that transformed an everyday experience!

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Heinz's upside-down ketchup bottle with a vacuum-sealed valve
PepsiCo's biodegradable Frito-Lay SunChips bag
Coca-Cola's PlantBottle made from renewable plant materials
Tetra Pak's aseptic cardboard packaging for liquid foods