It's nothing to stress over! Most people just pump into the storage bottles that come with their electric breast pump. That's what I did. I had the Medela pump with my son and therefore had a bunch of those storage bottles. Then with my daughter I wanted the Spectra pump but didn't want to buy a bunch of Spectra bottles. So I just found the converter online. Just use the bottles that come with the pump and get a few extra. Pump into those. And then pour into the bags you got if you plan on freezing the milk. Then you can just use whatever bottles you want to feed from - they don't have to be compatible with the breast pump. It's pretty simple! Message me with any questions.

I breastfeed my daughter but I work one day a week so pump milk for that one day.. I pump into the bottle then transfer to the bag and freeze.