When I found myself at a concert holding a cold sweaty Solo cup in one hand and an obsolete can koozie in the other, I knew I had to do something about it. And so the ZipSip was born! The ZipSip is the only patent-protected adjustable drink holder on the market. It fits anything from slim cans, regular cans, and bottles to pint glasses, Solo cups, and Starbucks cups all in one unique product!