This set of 12 hot color changing 16oz to-go cups, complete with removable sip lids, adds a pop of color to parties and everyday use. Simply fill tumblers with a hot beverage and watch the color of the tumbler change instantly. Assortment includes four bold colors: blue to purple, red to yellow, sky blue to teal, and green to yellow. Perfect for sharing with friends and family, you can rinse and reuse all season long! Please use caution when handling hot liquids.