Many work steps were necessary to transform a lump of clay into the finished vessel, which you are now holding. Every single piece is thrown and trimmed on the wheel with great care and attention. It is made out of porcelain of the highest quality which is blended with raw materials to achieve a certain tactile and visual appearance. The inside of each vessel is glazed with a glossy transparent glaze. The glaze is tested and certified by an independent environmental technology laboratory according to the EU regulation VO (EG) No. 1935 / 2004. Your product is food safe,water- and dishwasherproof. Cleaning by hand will, however, extend the life of your ceramic.