1. quality materials: Our LED coaster set is crafted from acrylic, which is nontoxic, safe, moistureresistant, and crystal clear. These coasters are reusable, easy to clean, heatresistant, and ecofriendly, adding an elegant touch to any setting. 2. LED Coaster Set: Our LED drink coasters come in a set of 6 luminous coasters. Powered by 2 batteries, these coasters require no tools or wiring. Just press and hold the power switch for a second to activate the LED glow. 3. 7 Lighting Modes: These coasters offer 7 lighting modes for vibrant and dynamic illumination. You can switch between ON/OFF settings to suit different moods or occasions. The fully sealed, waterproof design ensures durability and easy use, preventing battery contact issues. 4. Replaceable Batteries: You can easily the batteries to keep the brightness consistent. Just peel off the bottom sticker, swap the two button cells, and reapply the sticker. This ensures your LED coasters are always ready to light up your drinks and enhance your ambiance.