keeps things hot as expected but I am unable to ...
594456
keeps things hot as expected but I am unable to get the top off without assistance from a strong man.. I have it set on open as the instructions say to do but still top is vaccumed sealed and I am not strong enough to get it off.
483756
Thermos is a great brand. Had my ROCK version for more than 10 years until the vacuum finally sprung a leak. While this one is lighter, the biggest fallback is the cup. It is too small for most vehicle cup holders, so that's a big issue. And the worst part is that the cup is not insulated so when you pour your hot drink in, the cup is nearly impossible to hold due to the heat. Otherwise the thermos itself does a great job of keeping heat for more than 8 hours, even after opening it a few times. For best results preheat your thermos!
3518811
I have had other Calphalon products.  This pan tends to get very  hot quickly and stays hot.  I am burning things.  It doesn't seem to be as thick as I was expecting.
2857155
If you're used to using thermos brand, this is not for you. No where close it keeping it hot as long as a thermos brand.
3152262
This is amazing- it keeps my coffee hot for hours, even when the lid isn't sealed.  Four hours after I brewed it, the last drink of my coffee was still extremely warm.

Edit: After 2 weeks of using this mug, I think it works a little too well :)  I brewed some hot tea over 4 hours ago, and it's still too hot for me to drink!  There must be some kind of magic involved.
3918131
The bottom is not welded on and will fall off after time.  Keeps

Drinks hot for hours though but useless without a bottom.
3948036
It fits nicely into the absurdly narrow cupholders in my SUV, which was the main selling point. However, it also keeps hot beverages so hot for so long as to render it unusable, even dangerous. I literally sustained second-degree burns inside my mouth when sipping hours-old hot tea from it last weekend. The construction is such that you can't feel heat through the mug (intentionally so), but you also can't sense any heat coming from the open top. (Five days and a doctor's visit later, I'm gargling with viscous lidocaine and taking antibiotics to prevent the ulcers from becoming infected.) Buyer beware - it does what it promises and more, but that was not a good result in my case.
4156620
Although this thermos keeps liquids hot as advertised I have a problem with the design. The top of the thermos has a latch that slides and allows you to open and close the valve giving content control. The latch is very easily moved so if you have it in your bag and it happens to be moved by another object in your bag, all the contents of the thermos will come flowing out in side the bag. You MUST keep this thermos upright and away from other objects if you pack away or you will have a hot mess like I had recently. There needs to be a cover for the lid to keep anything from accidently moving the latch or maybe a locking device. Until then, I cannot recommend this thermos.
632333
I have another Bubba 24 ounce cup that I love and liked this mug style and was hoping it would keep my coffee just as hot as my other Bubba does. This mug looks and feels great, but only keeps my coffee warm, but not hot as I like it.
2373348
I bought this to keep my coffee hot. All the reviews raved about how long it keeps the coffee hot. I even put hot water in my cup to heat the metal up before I pour my coffee in the cup. I haven't noticed it any better then my old fashion coffee mug. I was super bummed because I am a slow coffee drinker. There is this odd gap between where the coffee comes out of the lid and the edge of the cup that makes me feel like it is leaking, I have to sip the coffee from the edge so it doesnt drip down my cup and on my desk. :(
4156178
Works very well to keep beverage hot. I made drink touch too hot 5am, 3 1/2 hrs later still touch too hot even opening the lid to carefully sip a little several times. Next time I'll simply make drink at a comfortable temperature. Only wish would be the seemingly "over-complicated-lots-of-parts" lid be a closable spout for pouring and a detachable cup to allow beverage cooling and drinking.
2845295
Great for keeping coffee or tea hot and I love that the stainless steel inside doesn't hold scent. My one complaint is that it doesn't fit into any of my car's cupholders. I have an older car before cupholders got jumbo sized but because the bottom doesn't have any kind of taper, it just doesn't fit at all and that's frustrating if I want to drink coffee and drive. Would probably be a better product for someone with a newer car.
1328749
Generally, I like it, although I fail to see how, with a plastic top, it will keep things warm.  Could be bigger.
3315820
Does a great job keeping it hot. Leaks most of the time when i try to drink with the lid
2135478
Need to have a bottle cover when using it for hot liquids as it gets too hot to hold with bare hands.
1103738
Keeps the liquid extremely hot for a long time. But it is really hard to drink out of. You have to be really careful. No matter how slowly I go, it always seems to burn my face. Maybe I'm uncoordinated.
3223068
This is a neat travel mug/bottle, with one problem.  It keeps coffee too hot!  My wife uses it as a replacement for her travel mug, but the coffee in it doesn't cool down at all.  So, now she just carries her coffee in it and drinks it at the office.