Thank you for viewing. Combi Chonyu Jo-zu I am selling this because I received another one and am using that one. I only tested it once. ＜Product Description＞ ■ Hygienic Milk Preparation, 70°C Insulation Simply add boiling water, and it automatically keeps the water at 70°C or higher, which is ideal for preparing formula. Guidelines created by the World Health Organization (WHO) and the Food and Agriculture Organization of the United Nations (FAO) recommend making milk with water at 70°C or higher to kill harmful bacteria. ※ The ideal temperature for milk during feeding is 37-40°C (body temperature). ■ Easy Heating in the Microwave You can use a microwave to quickly prepare boiling water. ■ Long-lasting Insulation The cover shuts out the outside air. Because the pot is not exposed, it suppresses heat radiation from the pot's surface, maintaining an optimal water temperature of 70°C or higher (at room temperatures between 15°C and 25°C) for 24 hours. You can quickly prepare milk whenever you need it. ■ Large Capacity, 800ml Enough for four 200ml baby bottles. The large capacity provides peace of mind for babies who drink a lot or for twins. ■ Compatible Microwaves General household microwaves (output 500-700W), with an effective internal height of 14.0cm or more. Can also be used with flat-type microwaves. ＜Set Contents＞ Main body, glass pot, instruction manual