DetailsAdd a touch of class with the LED Beverage Glass 350 ml 12.5oz. With the flip of a switch on the bottom; you can set your light up multicolor beverage glass to one of a variety of light settings, including a variation of the colors flashing, a rainbow cycle, and constant on.Batteries: 3, AG-13. Replaceable, included and installed.Battery operated. Hand Wash only. Great for return gifts.