The Original for teas drinking enthusiasts We order our iron teapots from one of the largest manufacturers. IWATCHU has been making cast iron teapots in Japan for over 100 years. Every teapot is cast and finished by hand. IWATCHU iron teapots are enamelled on the inside (unfortunately some cheaper iron teapots are on sale today but as they are just painted they are unlikely to last long). The colour is applied on the outside with a spray gun. Every teapot includes instructions for use and a certificate of health.