And right now, Amazon and Best Buy are selling the 14-ounce smart mug in select colors starting at an all-time low of $89.99 ($60 off). The Ember Mug 2 hides heaters in a stainless steel body to ...

Before these smart devices ... the liquid to stay at the set temperature. Stainless mugs tend to be insulated, and their combination of material and design effectively slows heat loss.

It’s not dishwasher safe, however. The Ember Mug 2 is a temperature-controlled smart mug that keeps beverages hot. The accompanying iOS and Android apps allow you to dial in a specific ...