1.Material:pyrex glass 2.mouth blown and hand made 3.Tolerance temperature:+/-180 C 4. offer OEM service Details: The capacity is 350ml or 500mlMaterial is pyrex glass; mouth blown is hand-made. It can be usd for making tea, coffee, water and so on.It is beautiful for making blooming tea. like a flower in the pot.Temperature range from -180 to +180 degree. Safely used in microwave or fire stove. ...