My little one is just over 2 years old and I don't think he'd understand at all if I told him a fairy was going to come take his bottle away... he's not able to comprehend a concept like that!
The bottle is a source of great comfort to him. It's part of his routine and a small simple one at that. I am in no hurry to take it away from him. He doesn't take a bottle at any other time, just one 4 oz bit of happy tummy comfort before bed. We rock, he finishes his bottle and I take it from him and tuck him in to bed. (he doesn't fall asleep with it)
I just don't see a reason to make it an issue yet. If your daughter will go to bed without issue and sleep thru the night - if only you oblidge her a bottle before bed - why take that from her? She's still a baby!
Don't stress over it! Find what works for you and your daughter - if that's a bedtime bottle, so be it!
T.