This CURVE Teapot, complete with an extra-fine 0.3-mm stainless-steel tea infuser built-in teapot and cup, is designed for simple and clean way of making your own cup of tea. The extra-fine tea infuser gives you a perfect even steep every time, and enables you to steep fine loose-leaf teas such as Rooibos tea to large whole-leaf teas like Oolong tea.