ISO: Compatible bottles & milk storage bags for Spectra S2 breast pump

Allison

FTM planning to breast feed and pump. My health insurance is providing me with a Spectra S2 breast pump. Looking for bottle and milk bag storage recommendations that are compatible with this breast pump. How many bottles should I have on hand? Is it a good idea to have a few different brands for baby to try or just buy one and go from there? TIA!