Specifications: This cup is LED light cup, when pour into liquid (water, juice, beverage, beer, etc), it will light up and flash immediately, very magical. Suitable for celebrate, party, bars, gifts a more→nd so on. Auto change led color after fill in water or beer. Water activated: it glows automatically when drinks are added. Not for the liquid higher than 80℃. Enjoy different drinking moment with this vivid mug. Item Name: LED Flashing Cup Material: Acrylic Capacity: 285ml Light Color: Red, Yellow, Green, Blue Changing Power by: 2 x CR2025 Button Batteries (Included) Occasions: Pub, Club, Party, Cocktail, Halloween, Xmas, Wedding, etc Features: Eye Catching, Battery Replaceable, Color