Conduction

[desperance]

Hmm. I'm standing here - well, no: a minute ago, I was standing there - in the hall, poised, ready to go: heading for the Lit & Phil with my little Vaio (what used to be autopope's little Vaio, but is now mine, I tell you, mine...!) in my bag and this endless SF novella in my head & heart (I blame the Vaio - I think just a little of that essential Strossity rubbed off...), I was adding a thermos of coffee in the interests of parsimony (and good coffee: for lo, they do sell coffee in the library, and lo, it is of a strength barely measurable) - and, well, when you put hot coffee into a thermos flask, the flask's not supposed to be warm to the touch thereafter, is it? This whole flask thing is new to me, so I don't know; I just have a feeling that the hotness is supposed to be contained within the coffee...

*sighs*

*departs, with presumptively cooling coffee*

*s'okay, though, likes cold coffee. Drinks it all the time*

*sighs more*

Comments

[julesjones]

As noted by shewhomust, the real problem is if the coffee and not just the heat is leaking. If that is not the case, heat-preserving tip number 1 -- you pre-warmed the flask by filling it with boiling water and letting it stand for a couple of minutes, didn't you?