M.W.
J., Speaking as mother who has a 16 month son who was born with issues, I can tell you this will not be easy. He may not be ready for it. My son just started drinking a cup all the time about 1 month ago. Here is what we had to do with my daughter. We got her to the point that she knew ios she wanted a bottle it got white milk only it, no juice or choclate milk and she also knew that she had to go to bed if she wanted a bottle. Just keep trying, and try to make it fun. I know it is hard, and my daughter took her bottle until she was 2. Hope everything goes well.