Thirstystone Coasters exceptional designs combined with 100% natural sandstone make for an enduring, practical home decor accessory. Thirstystone Coasters are cut from the finest, most absorbent sandstone found in the Western United States. The unusual nature of the porous sandstone literally absorbs messy drips from beverages without leaking onto furniture and, with proper care, will not stick to the bottom of your glass, bottle, can, etc. when you pick up your drink. Thirstystone Coasters will not lose the ability to absorb over time, will not warp with use, and are stain resistant.