Shirobara Milk Mug Cup Set of 2 Unused Not for Sale Mug Cup with Measurement Mark, Ceramic Tottori Prefecture Mug Cup White Rose Daisen Ranch Size: Approximately 7.3cm in diameter Approximately 8cm in height Daisen Dairy Farmers' Cooperative ✤Shirobara Coffee✤ A Magical Mug Cup Where the Design Appears Magical color ink that changes color at 60°C or higher is used for part of the design. When you put a hot drink in the mug cup, the design will appear. It returns to its original state at room temperature, so you can use it repeatedly. The one with the design showing is the one I use. The one I will deliver is the unused one. Since it is an old item stored in the warehouse, Please refrain from purchasing if you are sensitive (T_T) It's a rare item that is no longer available. The last set. First come, first served ╰(*´︶`*)╯