Long-term use of stainless steel, after all, is a metal, there will always be concerns about destroying the effect of tea soup, so the cup will be relieved. After all, the experiment uses glassware instead of stainless steel, and the hot water kettle only boils water, and stainless steel is no problem; In fact, the best one is Lin Kang Glass Pot Ceramic Furnace, which has stainless steel heating plates. Stainless steel and glass are in contact with tea soup.