In this video I tested the Nuwave Smart Heated & Rechargeable Coffee Mug to see if it’s actually worth buying and whether it can compete with the idea of an Ember-style smart mug. It’s a 16 oz mug with customizable brew modes and up to a 5-hour battery life, so I walked through the unboxing first (mug, heating plate, charging brick/cable, quick start guide, and a coffee grounds filter). I also like that the brewing container fits well on top, and once you’re done brewing you can swap to the plastic lid to help keep your drink warmer. After that, I went through the modes on the base—brew, black tea, green tea, coffee, hot, warm—and checked how the temperature readout compares to a real thermometer. The temperature gauge was very accurate in my test (71°F on the display vs 70.7°F on my thermometer). Then I ran two real-world tests: first, how long it takes to reach 150°F (spoiler: it took way too long and didn’t hit it in a reasonable time), and second, brewing black tea at 205°F for 3 minutes, which worked extremely well. My takeaway is simple: this mug shines as a “keep it warm” solution (135–150°F off the base), not as a fast heater to bring cold liquid up to temp.