WTF Fun Fact – Paul Brown’s Squeeze Bottle Valve

Paul Brown invented the upside-down squeeze bottle valve in 1991 after 111 failed prototypes. He then sold his product to everyone from shampoo companies to Heinz to NASA. Four years later he sold his company for $13 million. – WTF Fun Facts

Source: https://thepatentprofessor.com/this-plucky-inventor-turned-our-world-upside-down/