Features: Safe Material. The flute cups are made of food-grade plastic, with no adverse effects on human health. Safe for drinking. Liquid Activated. Two tiny pins on the bottom activate the LED. The light turns on when liquid is poured into the cup and turns off when the cup is empty. A colorful light effect reflects off the sparkly crystals embedded in the bottom of the glass and shines through the liquid. The LED operates for up to 24 hours total using CR1220 button batteries. The cup can also be used as a regular champagne glass. Eye-Catching. A fun novelty item ideal for parties and gatherings. It draws attention in well-lit rooms and stands out especially in dim lighting. The multi-color mode adds a vibrant and festive atmosphere. Perfect Gift. Champagne glasses make a great gift. Colorful LED cups create a festive mood and offer a decorative way to serve champagne or wine. Suitable for club decor, Halloween, home decor, bar events, birthday celebrations, and party decorations. Note: Actual color may vary slightly from the image due to differences in monitor displays and lighting conditions. Specification: Material: PS Size: 6.8 x H18cm, Caliber 5.2cm Volume: 150ml Includes: 6 x Cups