Our coasters have a full melamine surface. Melamine is an extremely durable product, able to withstand temperatures of 140 degrees Celsius. The coaster is easily wiped clean (no dishwashers please), and with very little care will give you many years of service. The carbon footprint of this product is as small possible. It is made in the UK, so no long journeys from far off lands. DISPATCHED SAME DAY (order and pay before 3pm).