Medela Pump & Save Breast Milk Bags allow you to pump and pour into bags for fast, easy breast milk storage in the fridge or freezer. The bags feature easy-close zipper top that doesnt leak and a stand-up bottom to prevent spills. Save time and use the easy-connect adapter to pump breast milk directly into bags, or pour directly from bottle to bag for simple storage. Compatible with all Medela breastpumps. The Medela Pump & Save Breast Milk Bags 5oz/150mL are made without BPA and available in 20ct and 50ct packages.