J.B.
Hey K.,
To get my son on whole milk I just started with 1/4 milk 3/4 formula then 1/2 and 1/2 and so on. I would say in about a month or so he was on whole milk, around 13 months or so. I didn't worry about getting him off a bottle at that time because I wanted him to transition to milk first and just handle one change at a time. Around 17 months or so I transitioned him to a sippy cup of milk. Actually we were out one day and I didn't have a bottle and he was supper thirsty. I bought him some milk and put it in a sippy I did have with me and he sucked it down. From that day on, the bottles ended. So maybe try to get him adjusted to milk and and in a few months just try him on a sippy and see how it goes. Good luck!