Transition to whole milk…

FTM and my lil guy was given the go ahead from our pediatrician to ween off formula to whole milk early due to the formula shortage (turns 1 on 6/5). He’s doing great so far but I guess I just don’t know how to fully stop the formula lol. He does 3 meals a day, no snacks (those are still bottles) and I know he can only drink up to 24oz of whole milk a day. Would it be easier to cut 2 bottles and make them snacks with a sippy of milk? And still do a morning and night bottle of formula with some milk… I just don’t know the easiest way. Help please 🤗