How good does a formula in a bottle last if my baby doesn't finish it?

1 hour room temp, I think 3 hours refrigerated if baby doesn't drink any of it at all

My understanding, it's only good for one solid hour, after that, you chance bacteria growing in it. Not too sure if putting it in the fridge "freezes" that. I was always told just make more. :)

Ah, see, I wasn't aware of the 3hour in fridge. The more you know :)