This tea filter brewer is made of quality glass, which is harmless to your health. The transparent glass will bring you the enjoyment of tea. The glass tea filter and equal gaps make the boiling water fully penetrate the tea leaves. And the filter is convenient. The tea strainer is suitable for loose tea. This tea strainer is made of high borosilicate glass, which is heat resistant and explosion-proof, perfect for making tea. This tea strainer is very easy to use. Put some loose tea leaves into the filter, then add boiling water to the filter and the cup, then you can enjoy your tea. The strainer tube is fragile, please avoid accidental damage when using it.