Dayan WachiField Mug Collection - Set of 12 The official name is "2001 Limited Edition Box Set". This is a collection of 12 mugs, one for each month of the year, based on the 12 stories in the picture book "Dayan's Birthday." Each mug comes in its own box with a drawstring bag. They are unused and have been stored at home. The drawstring bags are clean, but some may have slightly changed color. I don't mind, but please be aware of this. The boxes are dirty. The cups are clean. Serial number: 0343/2001