Bottom Line: The Ember Mug 2 helped define what ... Heats for up to 1.5 hours away from its base. The 14-ounce capacity is similar to ordinary mugs. Recognizes when it's empty and turns itself ...

An curved arrow pointing right. Rejoice, coffee lovers. This high-tech Ember coffee mug claims it will keep your drink at the perfect temperature — down to the very last degree. Here's how it works.