Feature: 1. Power Gem Coasters: In just 10 minutes, the coaster produces hydrogen-rich water with a concentration of over 3000 ppb, representing a modern and innovative approach to hydration that optimizes your overall health. 2. Reusable Design: Unlike paper or cardboard coasters, rock coasters are designed with durability in mind for frequent use, ensuring long-lasting performance. Wipe with a damp cloth and towel dry as needed for best results. 3. Premium Material: Made of 100% all-natural high-quality slate, practical and very safe. Protect your table from the heat with this tea coaster. Non-slip bottom protects the surface of your furniture from sliding and scratching. 4. Broad Compatibility: This coaster brings elegance and style to your lifestyle, resists stains and spills, and keeps your table looking great. Suitable for various types of cups, like glass cups, ceramic cups, goblet, plastic cups, etc. 5. Widely Used: Natural eye-catching insulation coasters for offices, homes, hotels, etc. Not only can be used as coasters, also can be used in the arts and crafts category, painting, writing, carving, photo props, decoration, etc. Specification: The slate coasters are durable, stylish, and flat, fitting any color of a table. The round slate coasters with four anti-scratch pads protect counters and tabletops from stains and heat. Natural slate coasters not only can be used as cup coasters, or bar coasters, but also can be used in engraving, carving, photo props, decorations, handicraft class, painting, writing, home decor, and as a gift for your family, lover, friends and so on. Features: Power Gem Coasters: In just 10 minutes, the coaster produces hydrogen-rich water with a concentration of over 3000 ppb, representing a modern and innovative approach to hydration that optimizes your overall health. Reusable Design: Unlike paper or cardboard coasters, rock coasters are designed with durability in mind for frequent use, ensuring long-lasting performance. Wipe with a damp cloth and towel dry as needed for best results. Premium Material: Made of 100% all-natural high-quality slate, practical and very safe. Protect your table from the heat with this tea coaster. Non-slip bottom protects the surface of your furniture from sliding and scratching. Broad Compatibility: This coaster brings elegance and style to your lifestyle, resists stains and spills, and keeps your table looking great. Suitable for various types of cups, like glass cups, ceramic cups, goblet, plastic cups, etc. Widely Used: Natural eye-catching insulation coasters for offices, homes, hotels, etc. Not only can be used as coasters, also can be used in the arts and crafts category, painting, writing, carving, photo props, decoration, etc. Specifications: Material: Slate Color: Black Item Size: 100 * 100mm/3.94 * 3.94in Item Weight: 110g/3.88oz Package Size: 100 * 100 * 30mm/3.94 * 3.94 * 1.18in Package Weight: 1120g/39.51oz Packing List: 10Pcs Coasters Package List: 10Pcs Coasters