The Yamazaki Signature line products are all artistically crafted in 18/10 Stainless Steel. * This piece is designed as a sculptural object with elegant simplicity and functional artistry. * Each piece is inspected to insure only thefinest quality is shipped to our customers. * All Yamazaki products come with a lifetime warrantee against manufacturer's defects. * Each piece bears the signature of Yamazaki chairman Etsuji Yamazaki. The Yamazaki Signature wine coaster is designed with a slot to hold the matching wine stopper.