LED Activation: These Champagne Glasses feature tiny pins on the bottom that activate the LED light when liquid is poured in. The LED lights turn off when the cup is empty, creating a beautiful and dynamic effect as the colored lights reflect off the sparkling crystals at the base and shine through the liquid. Eye-Catching Design: Perfect for parties and gatherings, these LED glasses provide an eye-catching display. In well-lit rooms, they will grab attention, and in dim lighting, the multi-color mode shines bright, adding a fun and vibrant atmosphere. Long-Lasting LED: Powered by CR1220 button batteries, the LEDs can last up to 24 hours in total, ensuring long-lasting enjoyment. The glasses also function as normal champagne glasses when not lit, offering versatility for any occasion. Perfect Gift: These LED Champagne Glasses make a fantastic gift idea, ideal for club events, Halloween, house decor, bar birthdays, and parties. The colorful LED lights bring a festive mood to any setting, making them a hit at any celebration. Specifications: Made from durable PS material, these glasses measure 6.8*H18cm with a 5.2cm diameter, and hold a 150ml volume. Each set includes 6 cups. Note: Please be aware that the actual color may vary slightly due to different monitor and lighting effects.