I'd like to ask, will the traditional Chinese medicine in stainless steel thermos cup affect its efficacy?

Yes A large number of acidic substances are dissolved in the decocted traditional Chinese medicine, which is easy to react with the chemical substances contained in the inner wall of the thermos cup and dissolve in the soup, which has adverse effects on the human body. Therefore, the TAI℃ titanium gold pure titanium thermos cup I bought for the elderly at home is resistant to strong acid and alkali, but it will not produce any chemical reaction when it comes into contact with traditional Chinese medicine, which is convenient to carry around and much safer for the elderly to use.