Exactly what we did with all 3 of our kids. Made a few bottles up ahead of time. The last time we were at the pediatrician with our youngest (who is now 7) and told that to the nurse she was a bit aghast :)
True, that's the ideal scenario! We've tried room temperature milk in the past, but our baby refuses it :(
To be fair, I wouldn't drink room temperature milk... Hot or cold, but definitely not in-between :D