My little fella wont take a bottle - fullstop - tried lots of different combos - so we have moved to cup - as Teru said - I have bought the avent sippy attachments - and believe it or not he prefers to have it free flowing so just take the plastic off the back of the attachment - of course he cant do it by himself with no control of milk just yet - but he gets with idea.

Whatever type you get - I thik taking the plastic thing off for them to have a first suck of what is in it - and then putting it back on so they know what they are aiming for - is a good idea. Otherwise they have no idea to start with when they are little why they have this thing in their mouths which is nothing like a nipple