A.C.
I've said this to others, and I'll say it again, I don't get the point of taking away the bottle on a time line. I introduced my daughter to a sippy cup as soon as she could hold it, but I never tried to remove the bottle, and always gave her the choice, She gave it up on her own at about 3 years. She's almost 14 now, and has no ill effects of having had a bottle as long as she did. So my advise, unpopular as it may be, is let him keep his bottle until he's ready to give it up.