What cup do you use when you transition to whole milk?

My daughter used that munchkin straw cup for water but I don’t think she will sit there and drink her milk. I tried to put whole milk in it and she will take a few sips and be done take another few sips and be done. It would take her over an hour to finish. We still use bottles for her formula, and she still likes being held and fed 😑 What cup can I transition her to?