Coffee Temperature Control Travel Coffee Mug and Desktop Warmer, Long Lasting Battery Powered Heated Portable Smart Mug, Stainless Steel, 16 oz, Black

I purchased a Cauldryn Fyre when it was first released last year, but found myself using it primarily to maintain the temperature of my coffee throughout the day. When Cauldryn released this model designed specifically for coffee drinkers, I was intrigued enough by the additional coffee-focused features to give it a try. I am glad I did, as it's clear that the makers put some thought into what exactly coffee-drinkers such as myself were looking for.First of all, the bottle is substantially lighter than the Fyre Mobile. I'm not sure whether this is from improvements in manufacturing, or whether they can simply use a lower-capacity battery when there is no need to bring water all the way to a boil. In either case, I have never come close to draining the battery even with a full day's use. I really underestimated how much having a lighter bottle improves the daily experience, and this alone could make an upgrade worth it for those who carry their Cauldryn around all day.Second, you can now select any temperature you'd like to maintain your drink at. This is huge! I've really enjoyed playing around with this feature to hone in on the exact temperature I like to drink different coffees at. Along with this, it also has a nice LED readout that tells you what the temperature is.The lid on this new model is also a bit different. Personally, I prefer this lid to the original, as it seems to have a better "feel" to it. I'm not sure what else I can say about this, I just wanted to note that this is a difference between the models.This model also features a removable base that makes this a modular unit that you can add different accessories to. For example, I see that they have a coffee grinder attachment. I have not used any of these accessories, but I do like the idea of being able to easily expand the Cauldryn to find new uses.Finally, there is an app that you can use to control the Cauldryn remotely. I plan to use this to start heating the water while out for lunch in those situations where I want a single-cup pourover when I get back to the office.All in all, I am very happy I decided to purchase this new model of the Cauldryn. It comes in at basically the same price point, and with additional features that really add to the experience.

I like techy stuff, and I bought their first bottle 5 or 6 months ago. Loved it, worked exactly as I had hoped. I use it primarily for keeping my coffee warm at work or during my drive to work. I also have used it to heat up water for my french press and for freeze dried meals when we go camping. So I saw they are making a second version now and I ordered one. It arrived today, only took 3 days to arrive. I didn't think there was much that could be improved on the 1st version, but I really really like this new one. Love the digital screen and push button controls, so I can set it at an exact temperature, and buttons are easier to use that the first one. It comes with a smaller lighter battery, but I checked and the larger battery from my first one fits this new model just fine. I also really like the new lid, easier to sip from. I'm sure I'll keep finding more things I like, and hopefully nothing that I dont, after I've used it for a few more days. Anyways, I love it. 5 stars for sure.

I expected it to be junk but I looked at reviews outside of Amazon (since they can be suspect) and it was generally positive. The only thing I might change if I were designing this would be that it holds about 20% more volume. Whether that mean making it taller or a little fatter, I'm not sure, but as it is it's still a great coffee mug. The battery lasts all day for me, and I keep the temp at 145F for coffee. I would't recommend trying to boil water in it from room temp, it would take some time but it will eventually get there. It's great at keeping things hot that were already hot, like coffee. I'll update the review on how it performs outside in freezing temps.A CAUTIONARY NOTE: Don't try to remove the seal on the heating element. (see photo) It does come out, but you'll have a hell of a time getting it back in. You'll have to disassemble the component to allow heating element to come out of the housing in order to reseat the seal. It's doable with some ingenuity and resourcefulness, but I don't recommend it. (see some comments on doing that at the bottom of this review)They get a A+ on customer service. After I unknowingly made the error of removing that seal to clean the coffee crud out, they responded the same day and sent a replacement element for the error. A generous move for what was my own error.If you end up needing to reinstall the seal -(The nuts holding the heating element at the appropriate height are covered in vinyl or silicone, like liquid electrical tape, you'd have to get that stuff off to loosen the nuts and free the element, but remember to recoat it so the bolts, which probably get very hot, don't melt insulation on any of the wires that might make contact inside or ruin other internal components. When reinstalling the element, make sure you took note of the approximate length the bolt protruded through the nut when you removed it. This is in order to make sure you get a good seal when reinstalling it with the seal reattached, too loose and it could leak, too tight and it could warp or damage the element and end up leaking as well. It's not something you want to tighten down firm at the nut, you're gauge that you're there is a proper seal of the silicone seal not the tightness of the nut on the bolt)