Nice cup, keep coffee hot for quite a while
584304
Nice cup, keep coffee hot for quite a while. Overall what I expected. But it does not fit in cup holders in the car or lawn chairs.
2046204
I'm very happy with this cup. It's a pretty good size (a little bigger might be nice), lightweight, and the insulation makes a big difference over a non-insulated cup. One thing I've noticed in camping at higher elevations is that because of the lower boiling temperature, by the time the coffee, tea, etc. is done it's not that hot anymore. If you're using a plain metal cup, your drink is almost always too cool by the time you finish it. One other quick hit, I'm glad I went with the red color. With that, you can set it down and easily find it again if you're working on something.
2680746
I have several of these and love them. They work fantastically well for hot beverages (said from experience) as well as cold (according to my mother-in-law). I use one every weekday, and it keeps my coffee hot enough to drink for at least 3 hours with the lid flipped to open. On trips home (4 hours) I tend to keep it closed most of the way unless I'm drinking, and it stays hot the whole way. They're a bit pricey considering they're a glorified sippy cup, but I think they're worth it.
As for how long they keep things warm/hot, this depends greatly on whether or not you prime it (fill it with hot water for 5-10 minutes before you add your coffee), and whether or not you keep it opened or closed.
1889120
These cups are holding up great. Bought two and so far doing good. Keep in mind the top piece is plastic and does funky things when the liquid is to hot, but this only happened when it was INSANELY hot fluid. If used as intended it does well. Keeps hot for at least 2-3 hours.
32379
Definitely keeps coffee very hot. I find the lip of the cup fat so it's hard to drink out of.
1510916
Great mug, since apparently the older mugs seem to cause cancer or something.

Six hours for "hot" is wildly optimistic (Think in terms of coffee remaining hot for two hours or so before it drops down to "pee warm.")

But it's a quality unit, it's stood up to the beating I've given it.  It's got a nice lid and it doesn't leak if knocked over with the lid closed.  I use it every day as my office mug.

Might even get another one.
1345423
I purchased this for our daughter, who had one like this, in a larger size. She really liked it because it kept her coffee hot for a long time, and as a student, she enjoyed having hot coffee that lasted all morning. However, she did drop it a few times from her locker, and the lid finally broke.  So, that's the only reason for a 4-star rating. However, she requested another one for a Christmas gift of the same brand, but in a smaller size, so it is a cup worth having!  It does have a secure lock that prevents it from leaking, making it easy to toss in a backpack or purse when you're on the go.
4523224
This mug looks enough like a lens that I sometimes find myself trying to pinch the lid off, before realizing it's a screw top. Keeps hot drinks hot for about as long as other travel cups. The base is narrow which may be a concern, I haven't had any issues yet. My sample got too close to a hot burner and part of the outside deformed, so I'll get another one soon.
2583776
I really like this cup, I use it for my hot green tea. The only down side is that the cup gets too hot to even hold. Even with the silicone around it.
2598000
My wife took mine so I had to order another one. Keeps drinks hot or cold. My favorite cup now. Eventually the clear coating started to fail on the outside of the cup, but it's still functional. Minus one star for that
3633301
These double walled glass mugs are pretty nice... I like how they fell heavier/ more sturdy in my hand the other double walled glass cups that I have about the same size. I like this size cups, they almost hold 12 fl. oz of liquid. I use these the most- kind of like a multi purpose cup for me. It keeps hot tea or coffee warm longer than regular cups, which is good because sometimes I am a slow drinker. Also I like to drink ice cold lattes from this cup, which also seems to keep colder longer. Although they are dishwasher safe, I usually wash them by hand since I feel they will last me longer this way. Also, they are safe to use in the microwave. And I am surprised this company offers a 1 year warranty, which reassures me that these should last me a while. I did get this pair of glass cups at a discount price to ensure quality testing and leaving an honest review. Not all my ratings are the same, nor am I affiliated with this company in any way... and I am not required to leave a high rating, just a truthful one based on my own opinions and experiences. So, I do hope my review, photo, and experiences are also somewhat helpful to you in your own purchasing decisions.
1275344
Great cup, perfect size (20 ounces), really keeps drinks cold for a long time.
162582
I really enjoy this mug.  At 12 oz, it's a more realistic size for my coffee drinking habits than the bigger 16 + oz models, and as an added benefit it's MUCH easier to handwash effectively without a bottle brush.  Keeps my coffee hot enough for around 2-2.5 hours, after that it starts to cool down noticeably.  In a perfect world I'd prefer a vacuum insulator and 6-8+ hours of insulation, but practically speaking 2-2.5 hrs is just fine for the way I use it.
1715582
I love this cup! It kept my coffee hot for 7 hours. Its easy to clean because of the lid pops open to clean. I use it everyday at work
3738920
great cup keeps ice cold water for 24 plus hrs even after adding more cool water keep my coffee hot!! foraround 4hrs then it stays good and warm for a while,but I finished my coffee sooner great for the price a lot cheaper than others
517672
This is a great cup for keeping that "commuter coffee" hot all the way to work. At 20 oz, it's about 2.5 cups of coffee for me with plenty of room for creamer. And, I really like the design, it's very sleek compared to my Contigo mug. The outside of the cup was cool to the touch, so holding the cup wasn't an issue either. Overall, a nice, sleek, functional cup to hold your coffee!
317475
Very nice. Coffee or tea, it holds heat well, nice and wide for those who like a big cup :-)