T.H.
Do you mean you feed him before he sleeps or he takes the bottle into the crib with him? If you're giving it to him and then taking it away, it really isn't a big deal. If he has teeth you should be brushing them, but if you're not don't stress, just try and do it relatively soon. I would have him sit somewhere other than his room and give him the bottle while holding him, do a quick tooth brush and put him to bed. I can't remember but I may not have started brushing my daughter's teeth until after we took away the nighttime cup of milk...so you could wait a bit too. Now, if you're putting it in the crib with him, that's not as good. I like the advice Momofone mentioned. Gradually transition to a sippy and then start taking it away. He probably uses a sippy already right? If he uses it for other feedings it won't be too hard to get him used to using it at bed time too.