To activate your LED High Ball Glass, press the button on the base of the cup. With each push of the button, change LEDs to 1 of 7 individual colors (steady light/no flash), then lastly a slow color change function. NOTE: Never put lighted glass in the dishwasher. Gently hand wash ONLY & keep moisture away from the base to avoid contact with batteries. "Glasses" are made of high quality acrylic that is FDA approved. Dimensions: Length 7.5 in. Width 2.5 in. Volume 14 oz. filled to brim LED Colors: 1 Blue, 1 Jade, 1 Red Includes 2 replaceable CR2032 Batteries.