LED Light Up Bottle Coaster Color Changing for Widding Party Bar Cup Drinks Coasters (Multicolor light) Pressure Activated- Turns On When a Bottle or Vase is Set On It Create Lighted Party Centerpieces,use to display items such as knick-knacks, crystal items, perfume bottles, etc. Great for store displays or in home use. Size-2x9.5x9.5cm Battery-not included Made of high quality plastic materials