Milk transition to cup

Laura

I’m starting to prepare to wean my breastfed baby after 12 months. Since we have been in quarantine I have only been nursing her so she has not had a bottle in a very long time. Now I would like to get her to drink milk out of a cup but she always pushes it away. She does great drinking water out of her Munchkin straw cup but she will not drink milk out of a cup. I’ve tried an open cup and a different colored Munchkin cup and she gets upset. I’ve been using pumped milk. My original plan was to slowly add cows milk to the pumped milk after she turned one year but I can’t get her to drink milk at all unless it’s from the boob. Does anyone have any tips on how to get baby to drink milk from a cup? Thanks!