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 to meet different needs, ideal for events such as parties, weddings, campfires, and nighttime decorations. SUPER BRIGHTNESS: Each coaster features 4 Ultra-High Brightness LED lights, designed to illuminate clear containers such as wine glasses, champagne flutes, and liquor bottles. Multiple colors enhance party ambiance and help identify your drink. HOW TO USE: Remove the insulation insert, peel off the double-sided tape, and attach to any glass or cup. Press the button to turn on. Suitable for indoor or outdoor use, lightweight and portable. If the light does not work, check that the insulation has been removed or adjust the battery placement. ENOUGH WORKING TIME: Each unit comes with 2 CR1220 button batteries pre-installed. Battery life lasts over 24 hours, suitable for extended event use. Batteries are replaceable for continued use. Color: White Material: Not specified Package Contents: 25 x Sticker Lights Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.