My son turns 11 months old next week (December 19th). He drink 24 oz of formula a day (8 oz bottle at breakfast, lunch and dinner) with diluted juice or water in a sippy cup between meals along with a snack. I'm aware that babies should be on formula until their 1st birthday, but I'm not sure whether to start mixing whole milk with his formula starting at 11 months so that way he's completely transitioned by the time he turns 1, or if I dont start the actual transition until his 1st birthday. I only give him his formula in a bottle and everything else goes in a sippy cup. Hopefully that will help when it comes time to cut off formula; that way i can ditch the bottle at the same time.