Super-absorbent and quick-drying, crafted from natural diatomaceous earth, absorbing 2-4 times their volume in water. Sturdy and slip- design with silicone non-slip pads for ultimate grip on surfaces. Effortless maintenance; simply sand lightly with included sandpaper to refresh the . 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.