The mug was built with the intention of pouring in freshly brewed coffee, hot tea, or hot liquids in general. This is how we always recommend using your Ember mug.
With that said, it is possible to heat from a cold temperature, or room temperature. However, a few reasons we don't recommend this:
- It will take a long time! Depending on the temperature it can take anywhere from 30 minutes to an hour plus.
- If you are not using the coaster, it will take all of your battery life since the mug is heating to the maximum of its ability.
*Pro tip: The liquid must be above 100°F (37.8°C) in order for the Ember to recognize that liquid is present. If the liquid is below 100°F (37.8°C) the Ember may require manual adjusting of the temperature via the Ember App in order to begin regulating your beverage to the desired temperature.
If a user pours in a drink hotter than their desired temperature, Ember's battery won’t be needed until their drink reaches the desired temperature. Once at the preferred temperature, the heaters in the Ember mug will turn on to regulate the temperature. This will allow you to also get the best battery life possible.