From Noble Excellence, this mug features:  stoneware dishwasher, microwave, oven, and freezer safe capacity approx. 12-oz.  Imported. Stoneware: It's made from clay that is high-fired in temperature (1180C/2160F), which creates a vitrified glazed surface with very low porosity (less than 0.5%) revealing consistency and durability. Also has a high conservation capacity of the temperature of the foods and their textures. Have all the properties of China/Porcelain. The true advantage relies on the ability to keep the products practical and multi-purposed, elegant and stylish for entertaining, and its dishwasher and microwave safe. Centuries of Portuguese ceramic tradition serve as an inspiration while blending the finest mineral resources in Portugal to manufacture with exceptional design, resistance, and quality. Astoria: Rich-colored dinnerware brings ambiance to every meal. A hand-applied patina rim provides a complete range of tabletop items ideal for daily use and perfect for entertaining guests at your place.