JapanBargain S-2498, Green Yuzu Shaped Cast Iron Teapot 12oz #TB15-04G The cast iron teapot, also known as Tetsubin in Japan, is a classical Japanese teapot made from sturdy iron with enamel coating on the interior to prevent rusting. Pattern: Yuzu(Citrus) with Leaf Capacity: 12 fl.oz. Color: Green