Lansinoh Breast Milk Storage Bags are designed for safe and long-term storage of breast milk. Each bag is made from durable, BPA-free material and features a double zipper seal to prevent leaks. The pre-sterilized bags are perfect for collecting, storing, and freezing milk, helping to preserve its vital nutrients. They are ideal for mothers who pump and need to store milk for later use, whether for at home or for daycare.