The warranty of high borosilicate glass kettles is three years, and the service life of inferior health kettles is mostly six months to one year. The thermal expansion coefficient of high borosilicate glass is very low, which is one third of that of ordinary glass. This will reduce the influence of temperature gradient stress, so it has stronger fracture resistance. High borosilicate glass is widely used as the raw material of glass products, and many electric kettles and glassware are in use.