The steam catcher is built inside the lid with a steamless structure that prevents steam from escaping. No risk of burns from hot steam coming out of the steam hole. Leak proof design minimizes hot water leakage even if it falls over. The main unit is not hot. The double layer structure of the main unit is made of resin, so it does not get hot. It also has excellent heat retention and prevents boiling water from getting cold. When you boil it, the switch will automatically turn off and power off.