Breast Milk Bags perfect for storing breast milk in the fridge or freezer, both horizontally and upright. Storage bags in which you can express milk directly, with any Lansinoh breast pump. Lansinoh Breast Milk Storage Bags are ideal for storing breast milk in the fridge or freezer. They are a great help in creating a breast milk bank stored until needed. They include a hygienic safety closure with proof of opening, and a double seal to prevent spills or losses. The bags are pre- sterilized and do not contain plasticizers or harmful substances that can contaminate the stored milk. Double security lock with proof of opening pour spout to prevent spillage Tab to write down the extraction or expiration date Pre-sterilized and free of bisphenol A and S It is recommended to express milk directly into the storage bags with any Lansinoh breast pump. Just make sure you choose our bags to be compatible with direct-in-bag extraction. The bags include a tab where you can write the date, so mothers can know how long the milk has been stored.