A friend of mine is about to have her first baby, and she asked me if the bottles have to be the same brand as the brest pump - I told her I had no idea - but I would ask here.
It possibly depends on the type of pump. I had the Lansinoh (the same as the Ameda Purely Yours) pump, and I could attach any small mouthed bottle to it.
It is really hard to find an answer online - so I appreciate your input:) It sounds like the safest way to go in to match brands - or at least consult w/the (hopefully) knowledgeable store-clerks.
I used a Medela pump to pump into Medela storage bottles. However if you're talking the bottles the baby will eat from - I poured milk from the Medela storage bottles into Dr. Browns bottles for baby to eat.
Wife, Musician, Fed, WW-er, and Mom of three little kids - not necessarily in that order.
I used Mother's Milk storage bottles, and have both an Ameda and a Medela pump. They are both the standard size. I did have a hand pump that for some reason used a wider-mouth storage container. I did not use the storage containers for regular feeding bottles though. HTH.
Re: Question for a friend