Feature1. The LED light would be activated when you pour liquid into the tumbler2. Colorful LED light，suitable for occasions like Bars，parties and so on.3. Pour drinks in it and enjoy the dreamlike and fascinating effect created by the LED light4. Made out of PVC，a kind of plastic which is harmless to your health and durable5. Removable button battery at the bottom，you can use a coin to open the cover and change the battery SpecificationSize :7 ozBattery:CR2025*2lit time:20 hours(Approx)Color:7 colorsMaterial: PVCPackage content1*LED light Colorful Cup