2. Heat-resistant high-silicon borosilicate glass, also known as hard glass, is made by using the conductivity of glass at high temperature, melting the glass by heating it inside, and adopting advanced production technology. It has the characteristics of low expansion rate, high temperature resistance, high strength, high hardness and high light transmittance.
3. Stainless steel food-grade kettle is a necessary water heater at home, which is convenient and practical, but the general electric kettle has no function of purifying water and has no obvious improvement on water quality, so boiling water with electric kettle may not achieve the best taste.
4. Boiling water in an iron pot can improve the water quality, and the boiled water can be completely boiled, which has good heat preservation and is suitable for brewing high-temperature tea, such as black tea and white tea. The disadvantage is that the iron pot needs frequent maintenance.