We designed the Ciups Mug to be easy to use. To turn on, press the flame button near the bottom of the mug. The temperature display will allow you to select your desired temperature (95°F to 149°F) by pressing the arrows. After a few seconds, the display screen will flash 3 times, indicating that heating has started. While heating, the display will stay on and show the real-time temperature. To turn the heating off, hold the flame button until the display shows 'OFF'. 