My insurance covers various pumps including Medela PISA, Ameda, Spectra... There seems to be a lot of HBers who like the Medela PISA so I figured I'd go with that. I went to finish my registry/ies today and thought that by knowing what pump I'd have would make narrowing down the bottle choices significantly more.. Yeah, not so much. I know the PISA has bottles and bags that can be pumped into. I like the bags but how do I know where to go from there? Can the bags be used for anything or just for storage? Are there bottles they work with? Or are there bottles that the PISA work with? I'm completely stuck on this (well, and a couple other registry areas lol)!