I.B.
I have a 17 month old who had the same issue. She was having her milk twice a day out of a bottle. She was use to drinking water & juicewater out of her sippy cup but not her milk. The first few days were an adjustment. She actually cried the very first time I tried to give her milk from a sippy cupy. I even tried the chocolate milk thing in the sippy cup & she threw it. It's just repetition, time & patience. Some children adjust quicker than others. They learn that they're not going to get the bottle back & they adjust. Now, I give her milk to her in a sippy cup that has a soft tip that sticks up so it's kind of like her bottle...& she is happy as a little clam now. She usually drinks water from a sippy cup with a straw.