Fifty-five degree constant temperature coasters can heat eight-treasure porridge for about fifteen minutes. According to relevant public information, the constant temperature of 55-degree stall, warm boiled water and milk powder is about 38 to 45 degrees, that of 65-degree stall, warm boiled water, hot milk and coffee is about 45 to 50 degrees, and that of 75-degree stall, warm boiled water, scented tea and health tea is about 50 to 55 degrees. You can drink water with just the right temperature at any time, and the 55-degree constant warm coaster can be heated.