A most unusual melamine. Gorgeous color and love the confetti look. Mine are not signed Russel Wright but I have seen a piece in this same melmac (not a tumbler) that was. This is his shape for certain. All 6 tumblers are perfect. You either like them and want to buy them because you like them or you don't I'm not going to get into squabbles about signatures or markings or whatever because I really don't care what you think about these. These tumblers are meant for somebody who really really likes them a lot and wants them in their collection and has their own opinions about them as do I. Comments from Non Interested parties or general "busy bodies" will go unanswered. I've had them for several years and they were a part of my Russel Wright collection and I really enjoy them a lot and I'm not in a rush to sell them but I will sell them at this price. Buy them at your own risk as I also did and don't buy them unless you really really want them. 25 years experience. Safe shipper.