Eh don't worry about it too much...my little cousin is going on 4 and she's still drinking from a bottle, but she cries and cries if she can't get milk in a bottle; for some odd reason she can drink water and juice from a cup through a straw but she only takes milk in a bottle. I don't know why...kinda funny though.
Another fun story is when my aunt (who is ironically enough my little cousin's mom) decided it was time for me to quit drinking from a bottle and she took it and simply threw it in the garbage with me watching. But I didn't cry or flicnh; I simply looked her right in the eye and told her "It's okay. Grandma will get me a new one" and she did too
But I wouldn't be concerned with weining (spelling??) until the little whipper-snapper is 2. I may have drank from a bottle for many years but I have no speech problems or dental problems; I never needed braces. Just my own opinion here but I wish thee the best of luck with this no matter how you choose to handle it. ^.^
Dark Stranger - was SPOILED XD XD