Description:   1.Inductive、 no switch、 the glass will be glow automatically、 when the beverage is poured into the cup、 and it won't glow when there is no beverage in the cup 2.Usually the glass can glow lasts for up to 30 hours、 and changeable battery 3.Can hold all kinds of drinking、 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: 301-400ml Power By: 2 x 2025 Cell Batteries Size: 12x8.3cm\/4.7x3.3Inch   Package Includes: 1 x Inductive LED Wine\/Whisky Glass