Breastfed baby not taking bottle, what can I do?
Some babies just do not like taking a bottle, but don't give up until you have tried different types of nipples and different flows of nipple. Sometimes it is trial and error before you find one they will finally accept. Personally I found the Playtex drop ins like in the picture to be the easiest to transition with.
Nipple flow is very important to play with, I agree!