BURNOUT Temperature-Regulating Coffee Mug with Lid, 16 oz, Drops Temp & Holds for Hours, Insulated Stainless Steel Travel Tumbler w/HeatZorb by Lexo

The media could not be loaded. After about 4 years of daily use, I can reiterate that the Burnout is the best coffee mug I've ever seen. I revised my review today to demonstrate that it doesn't leak (please see video).My previous comments follow:The Burnout mug is not good, it is great.The design and construction are bulletproof.I easily adapted to the design differences between this mug and the typical insulated coffee mug.After two years of daily use in harsh conditions, the mug still looks new and doesn’t leak a drop.I am now convinced that this is the best insulated mug produced.My original review follows:The Burnout travel coffee mug is quite good.It relies on the same principle that we can all observe in the evening after a sunny day: a heat sink. ( Or, more accurately, the first law of thermodynamics / the law of conservation of energy).Just as your concrete driveway, patio or a brick wall exposed to the sun all day will radiate heat for some time after sunset, this mug, through the use of materials which efficiently absorb heat, gradually releases the heat over a period of hours, thus keeping the contents of the mug warm. .In order for this mug to perform as intended, you MUST preheat the container (mug) with hot water. If you don’t do this, the mug will still efficiently absorb heat from your coffee, and gradually release it back, but this will result in lukewarm coffee for an extended period of time.As you may note from my photo, I supplement the mugs insulation with a beer cozy, as I am a very slow coffee drinker.This mug works. (obviously, as it relies on scientific principles- the system is as predictable as gravity).The great thing about the mug is that it works AND it is almost identical in size to much more common, but far less effective, travel mugs.I tried a very expensive battery powered mug which was astoundingly large and heavy, but which had a smaller capacity than the Burnout mug.The battery powered unit was not only clumsy, it failed to keep my coffee warm enough to enjoy for more than 2-3 hours. In contrast, the Burnout mug unfailingly keeps my coffee at either the “just right” temperature or very slightly lower temperature for 4+ hours -as long as I properly preheat the mug.For me, this mug has only two negatives. Over many, many years of coffee drinking, I have muscle memory which causes me to slide the closing mechanism toward from the drink side of the mug in order to close the cap. This mug closes very well, never leaked, but is closed by moving the slide away from the opening. I guess this is not a really a design issue, rather it is an issue related to a long ingrained habit I have developed. But, as a result I’ve had a few spills and the accompanying curses.The second issue is the lip of the mug. It is quite sleek. If it protruded about 1/16” of an inch further, I think it would be perfect. As it is presently designed, it is pretty easy to accidentally “lose” a drop or two with each sip if I’m not paying attention. I have not experienced this issue with other travel mugs.Summary: I love the mug, it is built like a locomotive and should last my lifetime, it can’t stop working and is good looking. A Tiny design change would make it the perfect mug, but I would absolutely purchase it again, as it is presently designed.

I originally posted a negative one star review because I found that the lid opening lever is a weakpoint. A simple thermos knock over sitting on the floor caused it to break and now the thermos was not pleasant to use. My review was poor because I sent an email to their customer service and didn’t get a reply. Apparently now two months later, I received a couple follow ups that they did indeed reach out but I never saw the replies. Why I see it now and hadn’t seen them before, I don’t know but I do get a ton of spam emails daily. So maybe it was just luck.Regardless, my wife and I still use the products daily and they work as expected. We love them. Keeps our ginger lemon tea we make daily, hot and comfortable throughout our work day. I definitely recommend them. Because of their efforts to reach out and willingness to help I have updated my review score.**** Original ReviewI bought two units for my wife and I and we use them daily. They work as advertised and love them despite the fact they are heavier than a similar capacity thermos. A few days ago my wife’s thermos was sitting next to the couch as pictured here and our small Yorkie knocked it over, and the red cap broke off. So now the cap won’t stay open without holding it down. I figured I’d just order a new one but on the listing it stated it qualified for a lifetime warranty. I sent an email to [email protected] on April 19 at 1:29pm PST. 3 days later and still no reply. I ordered another lid reluctantly but concerned it could break again simply by the thermos being knocked over on its side. I don’t like knocking companies for bad support because it seems the norm these days but I spent nearly $200 for these less than 2 months ago and a little piece of plastic makes using this product less desirable.

UPDATE: Removed a star for the lid sealing mechanism. It is designed in a way that makes it nearly impossible to fully clean, so if you like cream in your coffee like me, you end up with a cheesy brown substance accumulating in places that cannot be easily reached with anything but a fine brush or pipe cleaner. I ended up ripping all of the mechanism out with a set of pliers. It is otherwise a terrific tumbler now except for no real seal on the top - which does not work that well to begin with. Horrible design!--Having read some of the negative reviews on this product, I want to clear up some of the issues that people have complained about.Lid Chemical Flavor: This is 100% true. Fresh out of the box, the plastic from the lid imparts a flavor to the drink. That really is not good. BUT what many of those reviewers do not mention is that it goes away after putting it through the dishwasher. Regular hand soap and water washing won't do it. You gotta put it through a good normal length machine wash to have an impact. 2-3 washes is even better. I have had mine for 2 weeks now and that is no longer an issue - but it never should be one!Heat Retention: Because the regulating lining uses a phase change material, it requires additional heat to saturate it. What that means is that if you fill it at 140F, it will not saturate the material and will likely cool your drink even further. Consequently will not give heat back to it over time. In order for this to work optimally, the drink you fill it with MUST BE HOT, otherwise you will be disappointed.I had an Ember tumbler that eventually failed, and this is it's replacement. Overall, the Burnout, when properly filled hot, will hold a drinkable temperature hours longer than the Ember would. Better still, the Burnout goes in the dishwasher and never needs power. Would not trade back.