My 16 mos old little monkey also wants the bottle at night. She drinks water very well from the sippy cup with meals and thorughout the day. I agree I need to get her off, but it will happen some day. She doesn't drink any juice and I brush her teeth daily. In other countries, esp where I am from, it is not uncommon for kids to be on the bottle till they are 2 or so. Only in the USA it's stressed to go cold turkey at one. Yeah, it will be hard, but believe me she won't be sucking on a bottle when she is in preschool or kindgergarten!
But when I do plan to get her off, I will probably go cold turkey. By then she will be more verbal and can understand why we are not giving her it anymore.
So yes, technically they should not be using a bottle after 1, but realistically, relax! As long as she's not running around with it or taking it to bed with her. It's not the end of the world, in contrary to those tongue-waggers who tsk tsk you if they see your child is still on the bottle. Look around, how many kids u see are still using the bottle?
Kids mature at different rates. Most 1 year olds are still babies and the bottle is very soothing. I've seen 1 year olds though, who can pass for being 18 mos old just for being so developmentally advanced (there's one kid in our Gymboree class who is always 6 mos ahead of everyone else in her peer group). They will grow out of it eventually.