The Store 'n Pour breast milk storage bags feature everything a new mother could want. No sticky tapes or twist ties to secure bags to the flange while pumping. Our unique flange adapters easily attach to pump kits and channel milk flow below the zip seal to prevent milk loss. Simply replace the collection bottles with adapters and hook the Store 'n Pour bags on to begin pumping. They are sterilized, BPA-free and freezer-safe.