I plan to EBF with no plans of pumping, as of right now. I have received a Playtex VentAire bottle gift set that has 2 9oz and 3 6oz and a 3 pack of 9oz Tommee Tippee bottles. I would like to have a few around just in case I need to use them. My question is, which do I keep? I know every baby is different on what bottles they like I just don't want to have that many bottles lying around if I don't need them.