During the 17th and 18th centuries, cast iron teapots were used all over Japan for boiling water and left over charcoal fire to keep it hot. Today the iron "Tetsubin" (also known as Japanese Cast Iron Pots) have an enamel coating inside and are a household necessity. There is a wide range of sizes and unique shapes, making them very popular among collectors. The shapes and decor of the "Tetsubin" are beautiful in their simplicity. They represent an aspect of Japanese culture that captures the spirit of the moment shared by those enjoying tea together.