When he was a kid, Frank Epperson left a mixture of soda and water in a cup outside overnight. When his mixture froze and he ate his newfound treat.
At first, Epperson called his invention the “Epsicle” and began selling it all over Neptune Beach in San Francisco that summer. Then, when he got older, Epperson’s children began calling his creation “Pop’s ‘Sicle,” or “Popsicle.”