Features: -The convenient way to store, carry and warm expressed breast milk, Medela breast milk storage bags are easy to use and hygienic. -No leaks with double zip protection and double walls -No tearing, splitting or cracking with heat-sealed seams -Bags stand upright for easy handling and lie flat for storage -Transport pouch included to keep breast milk bags organised and clean -BPA free -50 bags -6oz / 180ml