Mellow’s design ensures efficiency during heating and cooling. Additionally, the lid reduces water evaporation. The double paned container also aids in retaining heat and cooling water quickly.
Let's get technical
It has 1000 watts, so it heats up fast. This uses a bit of energy getting to the target temperature, but once it gets there, it uses about 30 watts to keep the water hot. For comparison’s sake, that’s about the same as a couple of LED light bulbs.
The cooling system has about 200 watts of power, so it can keep your food at refrigerator temperatures.