There is a new invention called the Ember Ceramic Mug from this past year from Ember Technologies. Maybe it can even be considered a “smart mug” because it can keep the temperature steady. Meant for drinking at home (not a travel mug), this mug is connected and will even let you know when your drink has reached the temperature you want. It holds 10 oz.
The price is $79.95. You can also purchase a Ceramic Mug Charging Coaster for 39.95 separately.
The Ember company also has a Travel Mug that sells for $149.95. They are also sold at Starbucks, Bestbuy, or Amazon.com. Like the mug, the travel mug will also keep you informed of the temperature through the app.
Here is a cnet review: