TEAPOTS ARE NOT FOR STOVETOP USE. These teapots are not to be used for boiling water on the stove. These teapots are ONLY for steeping and serving tea. Water should be brought to a boil in a tea kettle or other pot, and then poured into these teapots.
Most (but not all) of these teapots have filter baskets that will hold tea leaves, and serve as strainers (so that the leaves do not wind up in your cup).