The Water Sensor Luminous Cup is made of safe and sturdy PS environmental protection material. It features a colorful light that is activated by liquid, creating a mesmerizing glow. With its suitable capacity, it can hold various beverages. Perfect for parties, bars, weddings, or any event that needs a touch of magic. It makes an awesome gift and adds unforgettable memories to any occasion. Features: 1. Safe Material: The transparent glowing cups are made of sturdy PS environmental protection material. And it is a food-grade plastic. No adverse effects on human health. 2. Liquid Activated: With a colorful light built inside the bottom, just add liquid to activate the glowing wine cups. And the light will also automatically go out when the cup is empty. 3. Suitable Capacity: The ideal capacity is perfect for holding beer, wine, milk, water, beverages, etc. 4. Leave You Unforgettable Memories: The liquid activated glow cup is practical to apply on various kinds of occasions, such as at home, bars, nightclubs or discos, weddings, sporting events, festivals, night events, brightening up your party decorations, creating an unforgettable and warm atmosphere. 5. Awesome Gift: Best gift for Christmas, New Year's Eve, birthdays, weddings, shots, bars, or discos. It can easily be the center of attention. Specification: Material: PS Environmental Protection Material Product Color: Transparent Optional: Water Sensor Automatically Lights Up, Press The Button Product Size: Multiple Size Product Weight: Mutiple Weight Package Included: 1 x Flash Light Up Cup