Which packaging innovation was patented by William Painter in 1892, revolutionizing the beverage industry by eliminating the need for a separate tool to access the product?

Product packaging has evolved dramatically over the centuries, with some innovations fundamentally changing how we interact with products. Beyond just protecting contents, ingenious packaging designs have solved consumer pain points, reduced environmental impact, and created iconic brand experiences. This trivia question explores a groundbreaking packaging invention that transformed an entire industry and changed consumer behavior worldwide.

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The crown bottle cap (with crimped edges that grip the bottle rim)
The flip-top resealable tin (used initially for tobacco products)
The key-wind opening system (found on sardine tins)
The threaded screw cap (allowing bottles to be resealed)