http://www.newsweek.com/ember-travel-mug2-car-charger-review-1581415

I sip my morning coffee slower than its temperature naturally drops. If I'm drinking from a typical ceramic mug, it's almost always cold by the end. Drinking coffee is a race I typically lose. Ember's temperature-controlled mugs basically solved this problem for me. Each model contains a battery to keep your coffee hot. They also include Bluetooth connectivity to sync with an app for direct control over temperature and other features.

TYLER HAYES

To ensure you have as long as you need to drink your coffee hot, each mug comes with a saucer-like charger that plugs into the wall. In a similar move to extend battery life indefinitely on the road for both of its travel mugs, Ember now has a car charger. In theory, this is a perfect accessory for fans of Ember.