Stainless steel Real stainless steel contains no radiation. Stainless steel used in the cottage factory has nuclear radiation.
Because the manufacture of stainless steel requires nickel, and nickel is on the ore, often with radioactive elements, which is difficult to separate. Therefore, the nickel ingots in the futures market are very expensive, which is the reason. At present, many nickel mines used in cottage factories are imported from foreign countries. This ore containing no radioactive elements is directly used to extract nickel, and then this nickel is used to make stainless steel. Therefore, stainless steel is radioactive. This is the main reason why the stainless steel products sold by brand stores are much higher than those sold by Taobao.
So for the sake of safety, aluminum cups are safer than stainless steel cups. It's just that you change an aluminum cup every once in a while. Prevent molecular aluminum in aluminum cups from dissolving in water, causing aluminum poisoning.
Excessive intake of aluminum ions will damage our brains.