To activate your Light Up Shot Glass, simply press the button on the bottom of the glass. Choose from 3 different light settings. All of our drinkware are tested & confirmed BPA free. 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: Height 2.5 in. Width 1.75 in. Volume 2 oz. filled to brim LED Colors: 1 Blue Light Up Shot Glasses do not have replaceable batteries. Packaging: Each piece individually poly bagged in a plain white box -12 per box - 576 pieces per case.