Thanks girls - very interesting as I thinking bout breast milk and its certainly not heated up! lol
But it is!
We run our spa at 37 deg and it certainly is not room temp (its comfortably hot, really).
Body temp is really very warm.
Room temp water is probably only 15-20 deg.
I would think that feeding a very young baby(who cant regulate its own body temp) cold fluids would actually be a bad idea.
Why would you not want to heat it?