The Lansinoh Breastmilk Storage Bags are a convenient solution for storing and preserving breastmilk. With a capacity of 6 ounces per bag, these rectangular-shaped bags are made of low-density polyethylene material that is freezer safe. The bags come in a pack of 100, making them versatile for long-term storage. These disposable bags feature a zipper closure for easy opening and closing, and can be microwaved to thaw the milk quickly. Ideal for breastfeeding mothers looking to stock up on milk for later use.