Features: 1Transparent cup with 7 colors the color of the light is change automatically. Dreamy light full of style and add lively ambience. 2Can hold liquid such as water beer wine whisky vodka martini drinkware coffee tea etc. 3Water activated it glows automatically when drinks are added turns off when there is no liquid left. 4Perfect for weddings new year celebrationsbars discos specialty restaurants and any party. 5Made of high quality acrylic material environmental protection nontoxic and durable. Specification: Condition: 100% Brand NewItem Type: LED CupMaterial: AcrylicColor: TransparentSize: Approx.8.6x7.2x7.2cm/3.4x2.8x2.8inWeight: Approx.128g/4.5ozFlash Mode: Water sensingFlash Color: Seven colorsLuminous Duration: About 40 hoursBattery: 2 x CR2025 300mAh(Included)How to use: Simply insert a coin into the battery cover slot and rotate it counterclockwise. Package List: 1 x LED Cup Note: 1.Pleaseallow1‑2cmerrorduetomanualmeasurement.Thanksforyourunderstanding.2.Monitorsarenotcalibratedsameitemcolordisplayedinphotosmaybeshowingslightlydifferentfromtherealobject.Pleasetaketherealoneasstandard.