If she only 3 weeks old then think she should still be on slow flow/number 1 teat.... just follow the ages for the teats or get a colic one, I used colic teats... im not sure about the MAM bottles but pretty sure they do a colic teat.... or maybe use a bigger teat because the one she uses is too small and as shes sucking shes sucking in air aswell xx

@taralou, x

She's 3 weeks old, I used to use them but now use MAM bottles xxx

How old is your baby? it depends what bottles you use.. I used tommee tippee xx

What teats did you use with it? Apparently I've got to use bigger teats than what new borns have? @taralou xx

Its brilliant... I used it for my 2 after breastfeeding.... but everyone is different all you can do is try xc