The Ember Smart Mug 2 is a temperature-holding mug for slow sippers, best for slow sippers. Rated 4.4 out of 5 across 28 user ratings. The main drawback: battery lasts about an hour to a couple of hours off the coaster. We scored it 4.3 out of 5.
Keeping coffee at exactly the temperature you like, from first sip to last, is something no insulated mug can match, and it is why people who own an Ember tend to love it. The catch is everything around the heating: a battery that is short off the coaster and can fade, and an app you need for settings that can be frustrating to reconnect.
NoFussDeal rates the Ember Smart Mug 2 4.3 out of 5 at $89.99. Last updated September 26, 2026.
The heated base holds your drink at the temperature you set in the app, from first sip to last.
Up to 1.5 hours on the built-in battery, or all day on the included charging coaster.
A smartphone app sets the drinking temperature, and there are no buttons on the mug to change it.
A copper-coloured metallic finish, hand washable and submersible up to 1 metre, but not dishwasher or microwave safe.
Five of the six owner reviews we read mention it. All of them gave the product four or five stars. Score 93: we started at 88 and added 5 because the owner reviews that mention it are positive.
Ember lists the material as Copper and the material features as Insulated. One of the six owner reviews we read mentions it. That owner gave the product four or five stars. Score 88: its 4.4 star average on a 100 point scale.
Two of the six owner reviews we read mention it, and those owners gave the product four or five stars, so the complaints come from the wider group of buyers. None of the reviews we read say what goes wrong, so this score rests on the buyer ratings. 15% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 76: we started at 88 and took off 12 because it dra…
Two of the six owner reviews we read mention it, and those owners gave the product four or five stars, so the complaints come from the wider group of buyers. None of the reviews we read say what goes wrong, so this score rests on the buyer ratings. 15% of all ratings are three stars or fewer, which is where complaints like this usually sit. Score 76: we started at 88 and took off 12 because it draws mostly complaints.
64% of ratings are five stars and 21% are four. 9% are three stars and 6% are one or two. The spread skews positive, but enough ratings sit low that the drawbacks below are worth reading. Score 88: its 4.4 star average on a 100 point scale.
Based on 28 Amazon customer ratings, averaging 4.4 out of 5, recorded 12 September 2026. See the reviews on Amazon
| 5 stars | 64% | |
|---|---|---|
| 4 stars | 21% | |
| 3 stars | 9% | |
| 2 stars | 3% | |
| 1 stars | 3% |
I LOVE this mug. It works! I ordered the copper one and it is beautiful. I have a cup of green tea every day and it is so nice to have a warm cup of tea from first sip to the last drop. I wi… Read it on Amazonhappytapper · March 23, 2022 · Verified
Bought this product for my wife that keeps the same cup of coffee throughout the day and has to warm it multiple times. It works amazing to keep your drink at the perfect temp. However, If y… Read it on AmazonPaul armijo · January 8, 2022 · Verified
It's a gift, but it looks nice, sturdy, I would recommend itAmazon Customer · December 21, 2022 · Verified
Hot coffee is awesome. Cup stays charged a couple hours without base. The best. I own 5Amazon Customer · January 16, 2022 · Verified
My Daughter in law loves her mug. Keeps coffee warm and fresh all day.Sus Har · May 19, 2022 · Verified
I received my Ember as a gift. I use it every day and find it great, but I wish the software was less buggy. At least once a week with daily use, I have to put the mug back into pairing mode… Read it on AmazonD · November 23, 2022
Place the mug on the included charging coaster and let it charge before first use.
Download the Ember app on your phone and turn on Bluetooth.
Put the mug into pairing mode and follow the app's steps to connect.
Choose your preferred drinking temperature in the app. The mug remembers it.
Fill with freshly made coffee or tea, no more than 10 oz.
Return the mug to the coaster between sips for all-day temperature control.
For most buyers, yes: we score it 4.3 out of 5. On its coaster it does that all day, and the copper finish makes it a lovely gift.
Rated 4.4 out of 5 across 28 user ratings, with 64% giving it five stars and 3% one star.
Battery lasts about an hour to a couple of hours off the coaster. The battery can weaken noticeably within months.
Hand wash with warm soapy water and a soft sponge. Keep the coaster somewhere dry and clean.
Smart-home users can connect the mug to Home Assistant, which one owner finds more convenient and more reliable than the app.
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The Ember Mug 2 does something no insulated mug can: it keeps your coffee or tea at the temperature you chose until you finish it. On its coaster it does that all day, and the copper finish makes it a lovely gift. The weaknesses are all around the heating: short and fading battery life off the coaster, an app that is the only way to change settings and can need re-pairing, and durability complaints.
A genuinely useful luxury if you drink slowly at a desk. Treat it as a coaster-based mug rather than a travel mug, and accept the occasional app hassle.
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