I had a similiar issue with my daughter. When I tried to give her milk in a sippy cup rather than her bottle she refused to drink it out of the cup. She would drink everything else out of her sippy but not milk! But, I had made the decision to take her bottle away, so I was forced to work around the problem. I just made sure that she was getting her calcium in other forms. At that age, they do not have to drink milk since their diet is now based on food products. The milk is just supplemental. As long as she is getting enough solid foods then the milk becomes just a part of their well balanced diet. Instead of the milk, my daughter gets yogurt, or yogurt drinks. I actually am in the process of phasing out the yogurt drinks because they have too uch sugar. Try the light vanilla soy milk. It is full of calcium and other vitamins and she loves it! I also make her smoothies with milk, or soy milk and bananas or other fruit. Usually,all you have to do is just add something to the milk to get them to drink it and they wind up getting the same amount of calcium, and now they are also gettng the added vitamins from the fruit that you add. Its a win win! Good luck:)