The interior of SmartKettle is made of integrated 304 stainless steel, which is food grade and free from BPA and other harmful substances. It makes the SmartKettle corrosion-resistant and not easy to rust, so cleaning the inner of the kettle is no longer a difficult problem. With SmartKettle, allowing you to drink safe, odor-free hot water. The SmartKettle provides more precise temperature control functions. When water gets boiled, the kettle will automatically stop boiling. When dry-burning is detected, the power will be automatically shut off to prevent accidents. SmartKettle can boil around 8.5 cup of water (1 cup of water ≒ 200mL) at a time. You don't have to boil water frequently for making the whole family drinking the boiled water.