Which packaging innovation was patented in 1963 and helped transform a small soap company into a billion-dollar brand by solving the problem of soap becoming mushy in the shower?

In the world of consumer products, packaging innovations can dramatically transform a brand's success and market position. Some packaging breakthroughs have become iconic elements of brand identity, while others have solved long-standing consumer pain points or addressed environmental concerns. This trivia question focuses on a groundbreaking packaging innovation that revolutionized its product category and created a distinct competitive advantage.

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Dial's bacteria-resistant plastic soap dish
Dove's moisture-sealed foil wrapper
Irish Spring's cardboard outer box with scent perforations
Ivory's air-infused floating soap formula