Super-absorbent and quick-drying, crafted from natural diatomaceous earth, absorbing 2-4 times their volume in water. Effortless maintenance; simply sand lightly with included sandpaper to refresh the . Sturdy and slip- design with silicone non-slip pads for ultimate grip on surfaces. Versatile and stylish protection for drinks, plants, or decor, suitable for indoor or outdoor use. The stone coasters' irregular shape adds modern flair while preventing , spills, and scratches on furniture.