FeaturesMade from laminated foam board with smooth edge that will not scratch your hand.Easy to use, just peel off the double-sided tape, stick to the bottom of the cup and turn on the switch.The unique reflective sticker design perfectly reflects and amplifies light through the transparent container and liquid.Its thickness is 3mm, ultra thin and light, will not cause the cup to tip.Ideal for party, bar, restaurant, weeding, etc.Specification:-Color:White-Material:Foam Board-Diameter:6cm-Thickness:3mm-Light Color:White/Green/Blue/Red(Optional)