The Lansinoh Breast Milk Storage Bags are an ideal solution for storing or freezing precious breastmilk. This product comes with 100 bags and each one can hold up to 6 ounces. The Lansinoh breastmilk storage bags are double sealed to ensure the breast milk stays securely inside. The seams on the side of the bag are double sealed for additional protection against leaks and spills. The Lansinoh storage bags are pre-sterilized making them safe for storage and they're also BPA and BPS-free. This product when filled can be stored in the fridge or freezer for added convenience. The design of the Lansinoh bags allows you to pump directly into the bag itself, which can help to save time. The Lansinoh Breast Milk Storage Bags are one of the number one selling breast milk storage solutions.