All coasters are laser engraved and cut using a high quality maple veneer plywood.  Each coaster has been hand painted with 3 coats of clear polyurethane on the top surface as well as 2 coats on the sides and bottom.  Suitable for both hot and cold beverages.  Do not leave outdoors.  Hand wash with a damp cloth – do not submerge in water or use in a dishwasher.