Feature: 1. The transparent luminous cup is made of strong acrylic plastic, not easy to break, harmless to human body. 2. The light turns off when the cup is empty, when it is activated, the LED will flash and change color, which will definitely make people happy. 3. The best drink cup, party gift or decoration, suitable for use at Christmas, New Year's Eve, birthday, wedding, bar, nightclub, discos. 4. The perfect drink game, see who is the first to finish the drink and turn off the LED. 5. Beautiful and exquisite, will not be obtrusive when placed at any position, also a good gift for someone you like. Specification: Condition: 100% Brand NewItem Type: Flashing Cup .Material: AcrylicColor: TransparentFlash Mode: Water Sensor Flash Color: Seven Colors Luminous Duration: About 40 hours Battery: 2 x CR2025 300mAh (Battery included) Single Product Size: Approx. 9.5 x 7 x 9.4cm / 3.7 x 2.8 x 3.7inWeight: Approx. 224g / 7.9oz Package List: 2 x Flashing Cup Note: 1. Please allow 1‑3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.