Common problem. We’ve all been there. You’re working from home (again), you make a big pot of coffee, you pour a cup, and 90 minutes later you’re still stuck in that Zoom meeting—and your coffee is cold. You, friend, might need a temperature-controlled smart mug. The 10-ounce Smart Mug 2 from Ember is now selling on Amazon for only $99, a 24 percent discount. We haven’t seen a cheaper price on Amazon since December 2023, when it was $85. Me, personally, I have a bit of history with so-called “smart mugs.” In 2014, I mercilessly mocked a smart mug prototype from Vessyl because it promised to do…