Features: Safe Material: These flute glasses are made of food-grade plastic, ensuring no negative effects on human health. Safe to drink from. Liquid Activated: Two small pins on the bottom activate the LED light. The LED lights turn on when liquid is poured into the mug and turn off when the mug is empty. A beautiful effect as the colored light reflects off the sparkling crystals embedded in the bottom of the glass and then shines through the liquid in the glass. The LED light lifespan can be a total of 24 hours using CR1220 button batteries. It can also be used as a regular champagne glass. Eye-Catching: A clever novelty gadget for parties and all types of gatherings, a great asset to becoming a hit at a party. In a lit room, it will attract attention, but in low light, it's a real eye-catcher, especially in multi-color mode, truly beautiful and adds a fun atmosphere. Perfect Gift: These champagne glasses make a fantastic gift! Colorful LED mugs create a festive atmosphere and a decorative way to serve champagne or wine, perfect for club decorations, Halloween decorations, house decorations, birthday decorations in bars, party decorations, props. Note: The actual color may differ slightly from the image due to different monitors and lighting effects. Specification: Material: PS Size: 6.8*H18cm, Caliber 5.2cm Volume: 150ml Package List: 6 x Mugs