One Year Olds’s Mommas! MILK HELP PLEASE!!

Ok so my bug is quickly approaching his first birthday and I am SO excited and also in another stage of confusion because I know that means it’s time to change his schedule again. He is currently on 5 bottles a day. I know eventually we need to get to just milk with breakfast lunch and dinner. My question is— how to transition! Can you ladies who have one year olds share what you’re doing? I am thinking of starting slowly (subbing in a bottle for cows milk at meal time) but then I’m already stumped because do I take out the five ounce bottle and give him five ounces of milk? Any insight is helpful! Thanks in advance :-) 🍼🍼🍼🍼🍼🍼🍼🍼