The Ember Mug 2 is a smart temperature-control mug that maintains your drink at a precise temperature (120–145°F) for up to 80 minutes per charge. It's built for daily desk use, especially with its included charging coaster that powers the mug while you drink.
7 mentions · 2 threadslast mention Dec 2025
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I want to like this cup, I just got it at Costco while on sale. So far, at 135 degrees, it does the same thing as other cups when you add milk/cream, it creates a thin film on top after awhile and then that film sticks to the sides when you drink it. :( I will turn it down a little to see if that issue stops.
Just tried a lid and lowered temp to 130. Only 14% battery used in 22 minutes, that's awesome. Without lid at 135 we saw what, 36% battery used after 33 minutes. That's a big difference.
The lid makes a huge difference in battery life. Shame on Ember for not including it as standard.
I just set my mug on the coaster while I'm drinking it it stays charged
Did you have a lid on it when not drinking? This tip can extend the run time almost double..
Do you have the 1 or the 2? Or are all 10oz mugs a 1? I thought I heard the 2 last an extra 30 mins. So a brand new 1 and a used 2 might run about the same time.
The temperature reported by the Ember app has been accurate once it's reached target temp, and it maintains the perfect target temperature within a degree the whole time.
Owners consistently praise the Ember Mug 2's temperature accuracy—it maintains within a degree of your target (120–145°F). The included coaster charging solves the battery limitation for desk use; without it, expect 30–40 minutes of runtime at 135°F. The main friction points are weak standalone battery life (a lid sold separately extends this significantly) and milk-film residue that forms at higher temperatures. Buy this if you work at a desk and commit to coaster charging; avoid it if you need all-day portability or drink frequently with milk.