Light is on when the cup is filled with liquid (water, drink, alcohol etc.)
Light is off when no liquid’s filled in, except 3 goblets
batteries are at the bottom. open the lid with screwdriver. Put batteries in. Close the lid.
Luminescent cups are made of acrylic material (plexiglass), which is not easy to break, not real glass material
Ultra-bright rainbow color LED flashing cup is sure to liven up any party
Made of high quality and environmental acrylic
Simple push-button on/off mode selection switch
Can be used as a cup for placing water, soft drink or wine
Great gift for friends
1 Pc Led Flashing Cup
1 CR2025 Batteries.