Hi. You've already received a lot of replies on both ends of the spectrum. I fall on the transition off the bottle side of things. Not only for the cavity reason but more simply because it is much easier to make the transition sooner rather than later for both of you. My second son is 13 months old and this week we'll probably stop the nightime bottle which is the last one to go. I did the same with my first son with no issues whatsoever. Don't underestimate their ability to transition/adapt - as they get older it gets harder though. I love giving my son a bottle and its hard to let go of that closeness but there are other ways to replace it. You can still give her milk in a sippy and cuddle and then slowly water down or reduce that. Once you do transition embrace it and feel positive about it - kids really catch on to how you feel about something.