Nextmug by Nextboom - Temperature-Controlled, Self-Heating Coffee Mug (Sage - 14 oz.)

Had this for 2 years and still going strong wife loves it. Needed adapter to convert to Australian power socket. Would recommend 👌 to slow coffee/tea drinkers to keep drinks hot on a cold day or those very slow drinkers that microwave to make hot after go cold then this is your answer.

As a previous Ember owner, I'm very impressed with the NextMug. I decided to try the NextMug mostly because the little prongs on the Ember charge plates kept seizing up needing replacement of the charge coaster. It's hard to keep them dry all the time since they are always around liquid. Infrequent contact with liquid and the relatively weak springs under each charge contact prong, has resulted in 5 of my charge coasters seizing up over 2.5 years. I thought the elevated design of the NextMug's charge plate would result in them being less prone to seizing. We'll have to see about that over time. I also, of course, loved the price differential. The NextMug is substantially cheaper than the Ember. I also liked the many colour options. I was, however, concerned that at the lower price the NextMug would be of inferior quality. IT ISN'T. Indeed I prefer the shape, 'feel' and build quality of the NextMug over the Ember. I also prefer the colours. With Ember you can get any colour you want as long as its black or white (or at least that used to be the case). With NextMug you get a terrific rainbow of deep pastel colours to choose from. I've used the NextMug now for 6 months and love it. I like that I can use it/set it up without the need for an app. There is/was little value in the Ember's app other than being able to see how much battery was left - and it was a rather clunky app. It always takes time to sink up and the only thing I needed it for, the battery level indicator, wasn't on the home screen. You had to dig down to find it. The NextMug shows you right on the mug what your battery level is. The ONLY downside to the NextMug is that you have to turn it on. Ya, I know, quality problem to have. But after a couple years of the Ember Mug just turning itself on each morning when I poured coffee into it, I can't tell you how many times I have forgotten to press the On button on the NextMug to find lukewarm coffee when I take my first sip 20 minute later. That said, when I press the on button the coffee is piping hot again in just a few minutes. I've had the NextMug for 6 months now and I still forget to turn it on about half the time. Grrr! Old habits die hard. My hopes for a better charge plate, so far, have not been realized. About 6 months in the NextMug charge plate had to be replaced. It wasn't because the prongs seized though. In this case one of the two prongs broke off when I was cleaning it. There was a bit of gunk between the two prongs and I was cleaning it out with my fingernail and one of the prongs sparked and broke off. I wasn't pushing hard. I was purposely cleaning out the 'gunk' because I believe the gunk that had built up over time between the Ember prongs was part of the reason why they ultimately seized up all the time But the warranty replacement process was simple. All I had to do was email NextMug and ask for a replacement charge plate and they sent it out to me. I didn't need to show a proof of purchase or a picture of the damaged plate. They took my word for it. Ember also replaced all their broken charge plates (5 in total over the 2 and a half years I used it) within the one year warranty window. (Note: I had to buy two replacement ones of my own during that time after the warranty on the original and a replacement had ended). To replace under warranty, Ember required me (not unreasonably) to show proof of original purchase (a screenshot of my Amazon order) a photo of the damaged plate, and a photo of the serial number on the bottom of the damaged plate before they would send out a replacement. A bit more work than NextMug. That said, the NextMug person said that if I had needed a warranty replacement on the mug itself, then I would have had to have shown proof-of purchase. But not on charge plate warranty claims. Over the 2 plus years I used the Ember, the inside white coating had worn off making the inside looks really ugly. Also the life of the battery had more than halved. Meaning at the two year point the battery only lasted about 1/3 as long as when new. I'm guessing that the battery life of the NextMug will run down about the same over time too - like all rechargeable batteries do. Since I've only had it for 6 months so I can't compare them. But I also think the build quality and terrific interior coating of the NextMug will outlast that of the Ember. But I won't know that for sure for another year and a half. I wish BOTH companies had a little replacement charging nodule that could be swapped out of the charge plate. Maybe send a few extra with each mug because that is clearly the Achilles Heel of both products. The part that consistently failed on the Ember and, so far, has failed once on the NextMug. There would be no need to replace the entire charge coaster and charge cable if that little part that keeps breaking could be easily swapped out. I bet it would also save them a ton on warranty repair costs and shipping for them and such a swappable part would probably add only a $1 to the cost/price of the product. All in all, for the significant price savings, the build quality and the colour options and terrific customer service, I now recommend the NextMug over the Ember every time.

used this when i was on a trip to china in the winter. Very good once its fully charged.

This mug was a 2023 Christmas present to my wife as she loves her coffee to be hot and stay hot. At first this product was perfect. We even bought a second base so she could have hot coffee no matter where in the house she was. For the first year, all was good. Then, just after Christmas 2024, the mug failed, out of warranty by days. It would keep the coffee warm if on the base, but the moment it was removed, it would start cooling, as if the battery was kaput. Reading the reviews, it seems that this was not unusual-- the mug would fail in about a year. Similar problems are reported elsewhere as well. It seems pretty clear that there was some kind of defect in the 2023 version of the product. I contacted the company through their online form in early January 2025, but given that this product is made in China and that the company, Nextboom, is clearly a small outfit, I was not optimistic. And, I never received any response. But then, towards the end of January, we realized that the credit card with which we paid may have actually doubled the warranty. So we decided to pursue that. To submit the claim, we needed to document what a repair or replacement would cost so, I once again contacted the company. But this time, the response was totally different! Although the mug was slightly out of warranty, the representative, Kaitlyn, immediately responded and after clarifying the mode of failure, initiated a warranty replacement, which arrived within a few days. (It may have helped that we live less than 50 miles from where the company is located in Boulder, CO) The new mug works well and seems to have an even better battery life than the first one did. It's also a slightly different size and shape than the first one was. So, although I have no way to be sure, I suspect there was a product defect that has now been corrected. As a result, and because of the perfect response of Nextboom's customer service, I can offer a recommendation for this product without reservation. I guess time will tell if I'm correct, but for now, we could not be more satisfied.

Amazing product don't now how I lived with out it