Description:   1.Inductive、 no switch、 the cup will be light automatically、 when the water is poured into the cup、 and the light will be out when there is no water in the cup 2.Usually the cup can glow lasts for up to 20 hours、 and changeable battery 3.Can hold all kinds of liquid、 like water、 beer、 whiskey、wine and all kinds of beverage 4.Great for using at bar、 party、 evening、 convert、 disco and so on、 creative a cool atmosphere   Specification: Material: Acrylic LED Color: Colorful Cup Color: Transparent Capacity: 285ml Power By: 2 x 2025 Cell Batteries Size: 8x9.7x7.1\/3.1x3.8x2.8Inch   Package Includes: 1 x Inductive LED Wine\/Whisky Glass