Four (4) Litecubes&reg; Flashing LED Multi-color Freezable Ice Cubes / Rocks Simple push-button on/off mode selection switch. Rainbow mode, plus can be locked in one of the 8 solid colors. Made of high quality FDA approved clear acrylic. Filled with freezable jell! 15 to 20 hours battery life, or more. Batteries are not replaceable. Height: 1 1/2" (38 mm); Width: 1 1/4" (32 mm); Weight: 0.08 lb.