S.C.
My pediatrician grilled me about this so many times when my kids turned a year old, that I finally broke down and asked her WHY it was so important to get rid of the bottle? She kind of blinked at me in surprise and said "Well, because it will be harder to do as they get older."
Are you kidding me? All that fuss and misery over a hypothetical problem that I might have to deal with somewhere down the road? I decided right then and there that my daughter loved her night-time bottle and there's really NO difference between that and a "soft-tipped" sippy cup...so why bother? And when my pediatrician (or anyone else) asked about it, I just smiled and nodded and let them think she was off it. Because really, it's nobody's business but your own.
If you really do want to wean, though, you should use this site's search feature, because you're about the millionth person to ask this question and there's a lot of great advice out there. :-)