Description:   1.Inductive、 the cup will be light、 when the water is poured into the cup、 and the light will be out when there is no water in the cup 2.Can hold all kinds of liquid、 like water、 beer、 whiskey、wine and so on 3.Usually the cup can glow lasts for up to 20 hours、 and changeable battery 4.Great for using at bar、 party、 evening、 convert and so on、 creative a mystery atmosphere   Specification: Material: Acrylic Color: Colorful Capacity: 200ml Power By: 2 x 2025 Cell Batteries Size: 9x8.5cm\/3.5x3.3Inch   Package Includes: 1 x Inductive LED Wine Cup