This is the phantom lucky cup that came with Maruha Nichiro's Shrimp and Cheese Gratin. It is a rare cup, with some theories suggesting the probability of obtaining it is 1 in 100 million. How about adding it to your collection? I have washed it with detergent, but please refrain from purchasing if you are sensitive. It has become slightly creased from washing. It will be shipped flat. [Brand] Maruha Nichiro [Category] Phantom Lucky Cup [Color] Gold-toned [Material] Paper This is an item that you won't regret having for important milestones in your life. How about using it as a good luck charm? Incidentally, something lucky happened to me on the day I received this.