Guro Cast Iron Spark Teapot 54 Ounces (Black) High quality cast iron helps to keep your tea in the perfect serving temperature for longer periods of time. Porcelain enamel interior coating preserves the pure taste of your tea and increases the tetsubin's rust resistivity . Each Guro tetsubin was dedicatedly crafted with the finest materials and thus it will last for many years. Equipped with a curled wire handle to protect your hands from the heat. Can be heated in direct fire.