Hi cottontail,
Think you should talk to your doctor to confirm. Generally, think for children over 2, I've read in most books they say to limit milk intake to abt 16oz a day (480ml a day), otherwise their appetites will be affected and won't eat enough solids, then they don't get the minimum required vitamins and nutrients for proper growth and mental development. Then you have to buy supplements, etc.
Re bottle drinking, they don't advise to continue using bottles. Studies have shown it decreases appetite in some children and may cause teeth problems, development problems, etc.