Hi - I have been working on my registry list and do not know what type of bottles, nipples and how many to get. I am planning on breast feeding, using the Ameda Purely Yours pump. What bottles other than Ameda fit onto the pump? I would like to be able to pump into one bottle, store and add nipple for feeding....as little cleaning as necessary. What about nipple sizes? I find all of this overwhelming! I want to make sure I register for the right bottles and have enough! Thanks!