I'm with Jennifer and Marcellus on this. Reduce the feeds over a week or two, also to help you with your Breasts adjusting as well. I started to drop the during the day ones first as these seemed the easiest at the time. Then only had the night as she got up and had breakfast straight away.
With the during the day ones, distraction worked best or I would offer a snack of fruit and water. We were also out and about a fair bit of the time and she would fall asleep in the car not needing the feed to help her sleep.

A sippy cup with cows milk would be fine if she is eating well. DD doesn't particular likes cows milk, has a cup at creche only and here she has it on or in things. She just drinks water.

Good luck Nae.