But a sad mug of microwaved coffee is no replacement for sipping a freshly brewed cup as close to its original temperature as possible, and that's always going to be a losing race against time.

For coffee drinkers, the Ember Temperature Control Smart Mug 2 is part of a Cyber Monday Deal which has knocked 43% off the price of the mug. That brings it down from $130 to just $75. That’s ...