This mug is made of porcelain (stone powder) but has the texture of earthenware, like pottery made of clay. Porcelain is fired at a higher temperature than earthenware, making it durable. The design of the recessed bottom allows for stacking and convenient storage. Capacity: 320ml Dishwasher, Microwave...OK / Oven...NG ■ Due to the nature of the product, there may be individual differences in color and matte finish, but this does not affect the quality. Please understand this as part of the product's character. Size: Φ8.3cm/11.5cm x 9.5cm STACK MUG Navy New price: ¥1,386 (tax included) Used for several years, so there are scratches and stains. One of the six mugs has a broken handle that has been glued back on. (Image 7/11)