Forgot to say, its very late, he he he! My lo was on Dr Brown bottles for the first 5 months of his life. These are the most amazing things, combats wind completely! They are expensive but well worth it. I had to have 6 as he was feeding regularly but at 8 months you may get away with 4 or less depending on how often she feeds! I bought 2 to begin with to see if they helped, I had to wash them and sterilise them 3 times in 24 hours but I wasn't going to waste my money if they didn't work!! They truly are amazing, I would definitely try them! xx Good luck, let me know how you get on!