[hellosailor]

Sounds like your thermos needs to be sent to a re-education camp. I still have a few made with glass liners, they work better than the stainless ones, until the day they go "tinkle tinkle" and go to thermoheaven. And it really makes a difference if you preheat a thermos with boiling water and let it sit for a few minutes, before putting the "payload" in. Two 12-ounce thermoses (the old ones aren't a pint, the glass liner has bulk) will of course also mean the second cup is going to be hotter than if you used one big thermos.

Dunno, maybe you just need a genuine marine-grade thermos? :-)