how are you planning the transition to milk?
A will not drink formula from anything but a bottle. I tried an ounce of milk in a sippy the other day and he spit that out, too. Usually, he drinks no more than 4 oz of water from a sippy in an entire day. He's lazy and he likes to be able to lay back and guzzle rather than work for his liquids. I'm worried that we're either going to be on the bottle forever or that he'll be dehydrated since he won't take a lot of fluid from a sippy cup.