GrafixMat Cork Coaster: Map of Hawaii. The makings of conscientious ecology We select only the best cork from Portugal & Spain. Cork is the bark of the cork oak tree and can be harvested again and again for over 100 years without damaging the tree. We combine this with a Forest Stewardship Council, SCS green certified hardboard backing and laminate these materials to provide you with the classic, natural qualities of cork while obtaining outstanding durability. Last but not least, we laser engrave classic and contemporary designs on this natural surface plus the back-side of each coaster includes a story and graphic that complements the design engraved on the cork surface. We are confident you’ll enjoy our unique product for many years to come. And we do all this, here in the good ol’ USA!