We used Avent, as that seemed to be in every store, our house looked like an Avent factory (!) and then 4 months later my daughter changed her mind. We went through a terrible time where I didn't know why she wouldn't drink from the bottle until a friend told me to try a different teat. I picked NUK off the shelf in B2B and we stuck to it thereafter, she loved it and the shape is very different. I see NUK also now available in Mannings... Good luck!