To activate your LED Mason Jar Travel Mug, press the button underneath, and press it repeatedly to see all 8 light functions: choose from a variety of steady colors for chill mood lighting, or a fun “color splash” morphing 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 (W x H): 5.5″ x 6.25″ (Including handle) Straw Length: 8.25″ Liquid Volume: 18 oz. LED Colors: Multicolor Comes ready to use with 3 replaceable AG13 Batteries.