This was the response on another forum when I recommended the Zojirushi
"
Ok so this thing showed up yesterday. I didn’t open it until this morning. Right off the bat I was happy because it was taller than I expected which is good because that means it’s thin enough to fit in any cup holder made. I’ve never understood why cup holders in vehicles are not a uniform size, but that’s a gripe for another time.
0830 I fill it with hot coffee.
0831 it’s still hot. Not impressed.
0900 it’s still hot. Ok.
0930 it’s still hot. Big whoop.
1000 it’s still hot. Good.
1030 it’s still hot. Nice.
1100 it might be getting hotter......
1130 still scalding hot. I’m digging this.
Further updates to come.
ETA: I’m drinking straight out of the device and not pouring into a cup so this may take awhile because the contents are still scalding....
1200 it’s still hot.
1227 it’s still reallly hot......
1310 finally getting to a manageable temp, but still very hot.....
1330.....yeah....still hot. Real hot.
1400 still too hot for more than a sip......
1430 yes. Hot.
1500 less fear invoking heat, but still very hot. Gulping not advisable at this point.
1530 no one who likes their coffee HOT would complain about this temp.
1600 finally, more than a sip is possible.
1752 just got off the tractor. Still hot. Not warm. Hot. As in take a full swallow and you gonna wish you hadn’t kinda hot. I’m impressed.
1812 perfect coffee drinking temp if you like your coffee hot. 20oz to start with and there’s still a quarter of that left.
The moral of this story is this thing will make a GREAT thermos if you know it’s going to be a while before you’re going to get to it’s contents. Now if you plan on using it as a travel mug then you have 2 options. The first, make sure your coffee is at a temperature you can handle when you fill the mug. The other option is lid management. Obviously, all of the above is opening the lid, taking a drink and then closing the lid. For a commute I recommend leaving the lid open until the coffee reaches a temp that you want to maintain."
I would HIGHLY recommend this product to anyone.
Kudos to bacondude for bringing this thing to my attention