1. Ideal Size Coaster Set with Holder Package includes 6pcs of slate coasters (4 inch, Round) and a black metal holder (AntiRust), which fit almost all kinds of drinks, cups and mugs, like coffee, beer, wine, juice, tea. Widely used for home, kitchen, bar, dining, party, coffee house, table, etc 2. NonSlip, Tabletop Protection The black coasters for drinks were built with 3 soft pads on the bottom to prevent your cup from slipping off and scratching your table or furniture surface, and it's thick enough to be heatresistant, suitable for both cold and hot drinks 3. StainProof, Dry Keeper This drink coasters is created for preventing any drink and liquid leak on the table, help you keep your countertop, bar and tabletop surface away from oil stains, water, drinks, spills, scratches, a great helper for cleaning 4. Natural Coaster, Easy Cleaning This black stone coasters are made natural slate, we keep its edge as irregular as its original without processing, and the cup coasters are washable for reusing. Extraunique and for home, kitchen, apartment, table, desk and bar decor