1, look at the thickness of the glass wall. Most teapots use high-silica glass, and the thickness and weight of glass walls have professional technical standards. A good glass teapot is resistant to high temperature, and can be heated with open flame without cracking by heating tools such as alcohol stove and candle. Thick glass does not dissipate heat as fast as thin glass. When boiling water is poured in, the inner side of the cup wall is heated first and expands rapidly, but the outer surface does not expand synchronously, so it is broken. When the thin glass is poured into boiling water, the heat energy diffuses quickly, and the glass body expands evenly and synchronously, so it is not easy to burst. The thickness of heat-resistant glass tea set is determined after comprehensive professional consideration, and it is not recommended to buy it if it is too thin or too thick.

2. The lid of the teapot. The lid of the glass teapot should not be too loose or too tight. If it is too loose, it will fall off easily. If the lid is too tight and the seal is not good, when the temperature inside the pot changes, the air part will expand with heat and contract with cold, and the pressure difference between the inside and outside of the glass tea set will be unbalanced. At this time, the whole glass teapot is like a pressure vessel, which will explode once it exceeds the pressure load. Therefore, the lid and body of the glass tea set should maintain a certain tightness.

3. The overall structure of the teapot. Reconstruction is a factor that can not be ignored for any kind of teapot, and glass teapot is no exception. The structure of the glass teapot includes the overall coordination of the kettle body, spout, lid and handle, which has a smooth aesthetic feeling.