How funny, tessagin, I just thought of the thermos this afternoon! I do have a small one, which I will fill with hot water. I also have one of those little personal crock-pots so I can get some water heated in there too. Unfortunately, we are only allowed to have electric grills here (it's about the fire laws and the fact that we have wooden decks on our condo units) so the grill idea is a no-go! I'll have to check into misspriss's sterno stove idea though... never heard of those! (Can you tell I'm an indoor girl and not a camper...LOL.)
