I couldn't get my ebf baby to take one either at 1st. The 1 tip that seems to work is to point the bottle nipple towards the roof of their mouth toward their uvula-might have butchered spelling? Anyway, that induces their suckling reflex and was the one thing that seemed to help. I saw some mom's saying they were having trouble with that so I just thought I'd throw it out there. However, I think if they get hungry enough they'll take it and then it's just a matter of time before they get used to it.