Hey there. This may not be helpful, but I reckon once a night waking at 10 months is actually not too bad...
You could try putting water in the bottle instead - she may decide that's not worth waking up for if that's all that's on offer, KWIM?
I think the only other way is to try settling without the bottle (which would involve crying). If you want to do this, I'd say put your DS in your room and let DD have the bedroom to herself until you're satisfied with how she's sleeping. CC is really hard to do if you're trying not to wake anyone - make sure your DH is supportive cause it can be a very lonely thing to do.
Having re-read that, I sound very unsupportive of CC, but I did it with Natty. She was waking every hour or two overnight and I was trashed. I really wouldn't recommend it to any of my friends though, and I wouldn't do it again unless I felt there was no other option. Sorry if this post has been unhelpful. If so, just ignore it!