Features: 1. Made from premium grade borosilicate high heat resistant glass, Resistance temperature -30°-150°.It can be heated under an open flame. Of course, we don't recommend it to use the fire to boil water, because the handle of the teapot will burn your hands after heating. 2. More suitable for small fire or candle heating and insulation tea temperature. 3. The teacup has a capacity of 50ml, and the teacup is double-walled, and the heat insulation prevents hot hands. 4. The ideal tea set for Flower Tea is more suitable with a glass teapot. Beautiful and very decent, it not ashamed to put they on the table in front of the guests.