Featueres 1. Material: The mug is made of high quality Plastic material, with the shape of diamonds inside. 2. Function: The mug is an environmentally friendly transparent luminous mug, which emits light when the liquid is poured into it. (Water, drink, beer, etc.), and it is suitable for celebrations, parties, bars, gifts, etc. Very creative and interesting. Luminous time: Approximately 20 hours. 3. Add fun ambiance: these flashing light cups will bring you surprising visual appeal when you shut off the light in the rooms or party; The flashing effect also helps your guest remember which one is his cup while adding a fun ambiance to your gathering 4. Light up the event: the LED drinking tumblers are great party favors or decoration for nightclub, holiday parties, birthdays, weddings, sporting events, festivals, night events, bars, etc., they will light up the event and make your event memorable 5. Perfect for indoor or outdoor events, for beverage pong game, house parties, birthdays, theme nights, BBQs, holidays, wedding receptions, camping, the beach,dance clubs, concerts, festivals, karaoke Specification: Material: Plastic Color: Translucent Size: 16x9cm Weight: 165g Package Included: 1 x Luminous Cup