Transitioning to cows milk from breast milk...

EV

My daughter just turned one and while I’m not ready to totally wean, I am ready to supplement with cows/goat milk. Curious to hear what others have done? Do you replace one nursing session with milk in a sippy cup? Or do you just add milk to your own when offering a bottle? I work from home and go into the office once a week so she gets bottles that day and weekend nights if she wakes up (my husband gets up with her those nights if she wakes). I have about 65oz in the freezer and want to make it last as long as possible. What does everyone else do?