Which packaging innovation was created by Paul Brown in 1991, solving the problem of product waste and revolutionizing an entire industry?

In the world of consumer products, packaging innovations can sometimes be as groundbreaking as the products themselves. One particular packaging invention revolutionized an entire industry by solving a persistent consumer complaint while simultaneously reducing environmental waste and shipping costs. This innovation changed how consumers interact with a common household product and has since become the industry standard, saving millions in resources annually.

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The inverted squeeze bottle for ketchup
The upside-down toothpaste tube with flat cap
The silicone dispensing valve for shampoo bottles
The inverted squeeze bottle with no-drip valve for condiments