The Medela breast milk storage bags, patented and revolutionary, are the ideal solution for mothers who express milk, offering the most practical storage method. Its innovative design allows for one-handed filling and pouring, ensuring more comfort and safety. With 10 times better protection (improved oxygen protection compared to Medela's previous bags), breast milk is effectively preserved. Key features: leak-proof, double-layer cover design and double zipper closure provide extra sealing for increased safety; horizontal freezing, the flat shape optimizes freezer space, while the standing design facilitates temporary storage in the refrigerator; easy to write on, the label allows for easy date annotation, ensuring that the milk is always fresh; large capacity, 210 ml; recyclable and BPA-free, safer for the environment and the baby's health.