This is a prize from the "Bikkuriman Wonder Collection" smartphone app service launch campaign. It includes a set of 4 special coasters. The envelope has been opened, but the coasters themselves are unopened. The address label has been removed from the envelope, so there may be some slight dirt or wrinkles. Please refrain from purchasing if this is a concern. If you don't need the envelope, please comment and I can ship only the coasters and the winning notification. They will be shipped sandwiched between cardboard to prevent bending.