Description:1. Auto change led color after fill in water or beer.2. 3D Dragon design arround the cup.3. Note : Water induction cup、 add water needs will light oh、 oh no water will not light.4. Material : PP5. Volume :about 300 ml6. Battery power: built-in button batteries、 can be replaced;7. Lighting duration: 20 hoursPackage included:1* Beer cup (all the accessories are not included)1* batteryNote : The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness when photo taking.