Light up the room with the latest in glassware technology! Flashing red, blue and green L.E.D. lights will brighten your day and add spectacular color to your favorite drink. The lights are activated when the acrylic mug is picked up and tilted to take a drink. Put the mug down and the lights automatically turn off within 10-15 seconds. Also has a button on the bottom to turn the lights off. The mug is 6" tall & holds 19 fluid ounces. Requires three AAA batteries.