I#ve been exclusively breastfeeding my 6month year old and wanted to start changing to formula. I optimistically thought he could go straight to using a cup but I have BIG problems. He will drink water from the cup but absolutely refuses formula- shaking his head from side to side and getting in a terrible state. I am in a terrible state too because I am worried that he isn't getting the 600ml recommended and that I will still be breastfeeding him when he is five at this rate. I'm trying not to give in and feed by the breast but I feel so guilty!! How can I make him like formula? Should I worry so much about how much milk he has. He is eating three good meals a day.