The safest stainless steel is the one that is corrosion-resistant, non-toxic, and can withstand oxidation based on prolonged use of the stainless steel in a water or salty environment. In terms of stainless steel grade, we do recommend the 18/10 stainless steel as the safest stainless steel as it contains chemical compounds that won’t react with water or salt and can last for a long time under pressure.