D.R.
I think that is wonderful that she doesn't want the bottle when she goes to bed. She is getting enough food & formula thru out the day. It's usually hard to take away the night time bottle/sippy cup from the babies. That is their comfort to fall asleep if they don't use a pacifier.
I think this will make it much easier for you if she is choosing to go to sleep on her own w/out a bottle. =)