Which packaging innovation, patented in 1963, was initially rejected by beer companies but later revolutionized the beverage industry by solving the 'stackability problem'?

Product packaging has evolved dramatically throughout history, with certain innovations completely transforming industries and consumer experiences. One particular packaging invention revolutionized how we store, transport, and consume beverages worldwide. This trivia question explores a groundbreaking packaging design that not only solved practical problems but created an entirely new product category and changed consumer behavior forever.

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The pull-tab aluminum can
The ring-pull bottle cap
The Tetra Pak aseptic carton
The plastic six-pack ring carrier