Preserve your breast milk for future feedings with these Medela breast milk storage bags. Designed for filling after you pump, these hygienically pre-sealed bags feature double-layered materials to retain nutrients while a double zipper prevents leaks. They go straight into the freezer for long-term storage and thaw quickly when you're ready to use the milk. | Medela 6 oz. Breast Milk Storage Bags - 50 Pack