Bestbuy offers Ember - Temperature Control Smart Mug² - 14 oz - Black for $89.99 (orig. $149.99) with free shipping.

Product Description:
Designed for home or office, Ember Mug 2 does more than simply keep your coffee hot. The temperature control smart mug allows you to set your preferred drinking temperature (120°F – 145°F), so you can enjoy your hot drink—just the way you like it— from the first sip to the last drop. Ember Mug 2’s built-in battery maintains your chosen drinking temperature for up to 80 minutes, or all day with the included charging coaster.

• Sip And Savor
  Capacity: 14 oz (414 ml) Dimensions: 4.60 in (117.0 mm) x 3.46 in (88.0 mm) Weight: 16.01 oz (457 g)
• Long Lasting Battery Life
  Maintain your perfect drinking temperature in the Ember Mug 2 for 80 minutes on a single charge or all day on the included Charging Coaster 2.
• Charge Status Indicator
  Set your empty Ember Mug on the included Charging Coaster 2 to charge. The smart LED light on the front of the Mug will breathe red when charging and be solid green when fully charged. The LED is white when heating or monitoring a hot beverage.
• Easy Cleaning
  Every Ember Mug 2 is IPX7 rated for full underwater submersion making your Mug easy to hand wash, rinse or soak.
• Your Temperature, Your Way
  Set the temperature of your hot drink down to the degree. Start with the preset 135°F or select your favorite temperature from a range of 120°F to 145°F (48.9°C to 62.8°C).
• Auto Sleep
  Simply start pouring to turn on your Ember Mug 2. When empty, it will automatically enter sleep mode to conserve power. Ember intelligently turns on and off using patented sensors to detect liquid level and temperature.
• Ember App
  Once you’ve paired your Ember Mug 2 to the Ember app, remotely set your drinking temperature, save presets for all your favorite drinks, try our tea steeping timers, or personalize the smart LED to your favorite color. The Ember App is compatible with iOS and Android devices.
• No More Microwaving
  Enjoy your hot beverages for hours without ever using a microwave. For safety reasons, the Ember Mug 2 should never be placed in a microwave oven.