my lo is almost 4 mths and would not take a bottle no matter what, we tried just about every bottle on the market and this weekend when I was at babies r us i picked up a tommee tippee sippy cup on the off chance it might work. i just talked to her babysitter and she drank out of it no problem and is now sleeping. i just wanted to share so those having this issue can try it. i know how stressful it is. Good luck.!!!
http://www.toysrus.com/product/index.jsp?productId=3946484&searchURL=false