My DD only wanted milk from a bottle too, even though she'd been drinking water from a sippy for months. She was down to a morning and an evening bottle, not going to bed with milk, and we were brushing teeth so I didn't mind keeping the bottles, and just continued to try milk in a cup every once in a while. One day she just accepted the cup and downed the whole thing as if it was a bottle. She was about 18 months then, and still chugs her cup of milk twice a day at nearly 3yrs old!
Anyway, I think the whole no bottles after a year thing is more to do with teeth than the bottle itself being a problem. I wouldn't worry about it yet, especially just for one a day