PACKING INCLUDE: 25 pcs Multipurpose Drink Coaster (5 x white, 5 x red, 5 x green, 5 x blue, 5 x multicolor). 3 LIGHTING MODES: Rapid flash, slow flash, and steady mode for various occasions such as parties, weddings, cocktail parties, dinner parties, and outdoor gatherings. SUPER BRIGHTNESS: Each coaster features 4 ultra-high brightness LED lights, illuminating clear containers such as wine bottles, wine glasses, champagne bottles, and liquor bottles. Multiple colors enhance the party atmosphere and help identify individual drinkware. HOW TO USE: Remove the insulation tab, peel off the adhesive backing, attach to any standard bottle or drinking glass, and press the button to activate. Suitable for indoor or outdoor use. Portable and easy to carry. If the light does not function, ensure the insulation tab has been removed and check battery placement. ENOUGH WORKING TIME: Each coaster includes 2 pre-installed CR1220 button batteries, providing over 24 hours of operation. Batteries are replaceable for continued use. Colour: White Material: EVA Package Contents: 25 x Sticker Lights Note: Light reflection and display variations may cause slight color differences between the product image and the actual item. Measurement tolerance: ±1–3 cm.