The body of Xiaozhuangxiong thermostatic kettle is made of thickened high borosilicate glass, which is resistant to sudden cold and heat, explosion-proof and crack-proof, firm and transparent, and can clearly see the water quality and quantity. The heating plate at the bottom of the kettle is made of 3 16L stainless steel, which is easy to clean and not easy to rust. The materials are safe and reliable, so you can use them with confidence. What surprised me was the speed of boiling. It only needs to be boiled for 5 minutes, and then it will automatically become the specified temperature. As long as there is no power failure, it can always keep a constant temperature. Now my husband has fallen in love with using a thermostatic kettle.