I too always heard that it's bad to drink anything except water before bed PERIOD....but that milk/bottles due cause tooth decay as well. Thats why we brush our teeth before bed, so there isn't food on our teeth - same rule goes for kids.

I don't have a "written poilcy" for it either because I too thought it was just DONE that way. They can drink a bottle if they want before nap downstairs, we brush our teeth (all the kids) then go down for nap.

If a parent wanted the child to drink in bed I just wouldn't do it. I'd continue my way....but that's how I see things.