The benefits of stainless steel cups are that they are durable, rust-resistant, and corrosion-resistant. However, stainless steel cups are alloy products, which contain more heavy metal substances, such as nickel, chromium, manganese, etc., if used improperly, these heavy metal substances are easy to be released, endangering health. Therefore, in daily use, it is necessary to be careful not to use stainless steel cups for acidic drinks, such as juice, coffee, carbonated drinks, etc.; It is also not allowed to hold soy sauce, vinegar, vegetable soup, tea, etc. for a long time, because the electrolytes in these foods may react chemically with the heavy metal substances in stainless steel, resulting in the precipitation of heavy metal substances. When washing stainless steel cups, do not use strong alkaline or strong oxidizing chemicals such as soda, bleaching powder, etc., these substances are also easy to react with stainless steel.