This is vaunting, this is cool! No matter where you are in include the bar, discos, or dinner party, or romantic candlelight dinner.It is to show the glare of the colorful lights when Raising your hand. When the drinks, also glow glaring light colors,That is a kind of charm and mysterious, even the stimulation of fresh feeling. -It turns off when there is no liquid left -Guaranteed to build moods for your party -Both romantic and practical. -Long battery life. -Multi Color Flashing LED. Stylish plastic flashing whiskey Mug. Rounded base, 295ml capacity. Featured with mix colored LEDs. Flickering in the darkness with dreamlike light, help to build a dynamic and exciting atmosphere. Perfect for party and house decoration use. Enjoy different drinking moment with this vivid mug. For changing batteries, open the lid with screwdriver. Put the batteries in. Close the lid.