For today only, Best Buy has the Ember Smart Mug 2 on sale for just $79.99 (typically $99.99). That's the lowest price for the mug that we've seen.
Beneath the surface, the Ember Smart Mug 2 is more than just a cup that warms up your drinks. Through the Ember companion app (available on iOS and Android), you can manually adjust the temperature of your beverage to the T. This is particularly useful if you prefer your coffee at a certain temperature -- not too hot, not too cold. The mug is also rated for IPX7, meaning it's washable and can be submerged up to one meter deep. In terms of battery life, you can expect the mug to last up to 1.5 hours per charge or all day when placed on the included charging coaster.
This deal covers the 10-ounce white model and expires at midnight, so you better act fast if smart home tech like this is your cup of tea.