C.W.
Hi RJ! My youngest daughter was like that...Once we took the bottle away from her she refused to drink milk out of a cup. She would drink juice and water but not milk. We would offer her milk in the cup constantly. She ate alot of cheese and I just started giving her vitamins with calcium. Once I convinced her to eat cereal with milk over it she started drinking the milk when she was done. It took a while but she finally decided there wasn't anything different about the milk and started asking for milk in her cups. I think it is just hard for them but in time they will realize it is the same thing that you put in the bottle and it will be okay. BTW, try regular cups instead of sippy cups. Josalyn never drank milk from a sippy cup. (maybe too much like a bottle? I don't know.) Might help!?
Good Luck!