That's why I said hot water. It's already at or above body temperature. I call it "free calories" because you don't need to use calories to heat the fluid.

Then again, I also call my black winter jacket "free calories" because if I go out in the sun it absorbs heat that way rather than having to only rely on body heat to warm the air spaces.

Or are you backing me and I'm just too groggy on cold meds to realise it? :P