DD is 11 wks EBF and is having about 1 bottle of expressed milk a day. She doesn't have much issue with the bottle feed in itself but the tommie tippie bottles and teats we're using don't seem great as i think she sucks too hard and the teat keeps getting pushed inwards. this results in her taking in lots of air and getting wind. can anyone recommend a better teat for EBF babies to use? thanks in advance :)