1Multicolor: This cup is specially designed to be bright when entering water, and has 6 colors. The lamp will turn off automatically when there is no liquid in the cup. The built in button battery can keep the light on for a long time. 2Automatic On Off: Just add liquid to activate the flashing multicolored LEDs in the base of the cup. The lights turn off when the cups are empty. 3Add Interesting Ambient: When you turn off the lights in your room or at a party, these flickering lamp cups will bring you amazing visual attraction. 4Perfect For Parties: Best drinkware party favors or decoration for Christmas, New Years Eve, birthdays, weddings, shots, bars, night clubs. 5Lighting Activities: LED wine cups are great party gifts or decorations. They will light up in nightclubs, holiday parties, birthdays, weddings, sports events, festivals, night activities, bars, etc.