Non-toxic, the rubber ring at the bottom of the thermostatic kettle is waterproof material, which mainly plays a sealing role. As far as the silica gel used in the health pot is concerned, it is mostly food grade, of course, the premise is the products produced by regular businesses. The apron at the bottom of this kind of health pot is non-toxic and resistant to high temperature, so even if heated, there will be no toxic substances and no harm to the user's body.