Borosilicate glass is not harmful to people. Borosilicate glass, also known as hard glass, is the use of glass at high temperatures in the conductive properties of the state, by heating the glass inside to achieve the melting of glass, processed through advanced production technology, borosilicate glass is a low expansion rate, high temperature resistance, high strength, high hardness, high transmittance and high chemical stability of the special glass materials, borosilicate glass is not harmful to the human body. Glass products have a particularly stable chemical properties of excellent performance, in general, glass products in the chemical substances are difficult to release, glass cups containing elements of the human body is non-toxic, so the use of glass cups to drink water is safe. Borosilicate glass is not harmful to the human body, but with lead glassware to hold acidic substances will be harmful to the human body.