The boiling water is cooled from 100 °C to an adjustable temperature between 40 °C and 60 °C in just 80 seconds. It operates on the principle of heat exchange. The water is cooled in the cooling body by the aluminum spiral inside. As the hot water flows through the spiral for the bottle, it is cooled to drinking temperature. Before use, fill your Cool Twister with water and place it in the refrigerator. To achieve optimal results, the Cool Twister should be in the refrigerator for at least 2 hours before preparing the bottle.