Zero Japan products are made from the finest porcelain-quality clay. From shaping to glazing the products, a lot of manual work is required. The entire process, including firing in the kiln, takes several days. The biscuit firing or first firing at a lower temperature is used to dry the clay, after which the glaze is applied by hand. The second firing at a very high temperature, which lasts about 18 hours, serves to make the product waterproof and to glaze the glaze. The right temperature ensures a brilliantly shiny glaze and a beautiful color. Japanese designer Koji Inoue designed Zero Japan's products with the following three concepts in mind: "highly functional", "beautiful to the touch" and "a delight to the eye". All teapots are equipped with a strainer for loose tea. The spout is des.