-Made of durable, easy-to-clean silicone, these coasters charge themselves with light during the day and glow in the dark at night. An ultra-handy addition to your nightstand, these coasters are decorated with a chic geometric pattern that comes to life once the lights are out. Material: Silicone, Color:Blue. Also could be used for bar accessories,home bar,bar,entertaining,bartender,coasters,glow in the dark coasters. By Cost Plus World Market.605509