A word on the Thermos thing....
I was quick to dismiss it earlier in this thread and from then to now I have had occasion to start using a thermos and want to update my opinion.
My new opinion is that it's a question of degrees of compromise.
I have started to carry a thermos with me (Thermos brand "The Rock") I also have the classic green Stanley but have not tested it yet. And the thing is that the coffee
does suffer over the hours but I find that I'm still happy to have it with me on the road when I want some coffee RIGHT NOW.
It's also very nice to be able to pour 4oz's of coffee now and 4 more in 11 min. and they are both perfectly hot.
Anyhow, it's an apology to the thermos I guess because I had the luxury of not needing it before so it was easy to dismiss but now I find it very useful.
It's still not a best solution to the OP but FWIW it's certainly not a horrible solution either.