Medela Breast Milk Storage Bags are pre-sterilized, BPA-free storage solutions designed for safely storing and freezing breast milk. Each pack contains 25 bags with a 180ml/6oz capacity, featuring clear measurement markings and a secure double-zipper seal for leak protection. Key features: • Pre-sterilized and ready to use • 180ml/6oz storage capacity • Double-zipper seal for leak protection • Clear measurement markings in ml and oz • BPA-free materials • Space for labeling date and volume • Lay-flat design for efficient storage These storage bags are designed to work seamlessly with Medela breast pumps for direct pumping or transfer of expressed milk. The bags can be stored in the refrigerator or freezer and include a convenient labeling area to note important details like date, time and volume. Their sturdy construction helps protect breast milk during storage and transport while the lay-flat design allows for organized storage and efficient use of space.