Can Chinese medicine be soaked in stainless steel thermos cup? !

Traditional Chinese medicine can be soaked in stainless steel thermos cups, which may be worse than traditional pottery in theory, but traditional pottery also contains unpredictable hazards such as heavy metals. Moreover, stainless steel is the first choice for filling all kinds of drinks in the world, even if there is a gap between stainless steel thermos cups and traditional tea cups, it can be ignored.