Sippy cup

Hi mommies. My daughter is 14 months old. She drinks only water from sippy cup since 5 months and milk from bottle. When i give milk in sippy cup she doesn't drink milk at all. I have been trying to give milk in sippy cup only but she keeps refusing it. I changed many cups but nothing helped. Any other tips or suggestions that you can give me how to transition to a cup. Pls respond. TIA 🙂