Medela's Breast Milk Storage Bags enable you to store extra breast milk in the fridge or freezer, so you baby won't need supplementary food or liquids if his or her demand changes. These ready-to-use breast milk storage bags make storing, transporting and warming of your breast milk convenient and hygienic. The bags have a freezer-proof, double zipper protection to prevent leaking and are more space-saving than using bottles. The flat shape of the bags ensures milk thaws quickly and the durable material is safe for freezer storage. The heat-sealed seams prevent them from tearing, splitting or cracking. Every bag has a large area for easy labeling and dating. Made without BPA. Pack of 100 bags and comes with a transport pouch to keep the bags clean and organized. The double-walled bags have a leak-proof double zipper, ensuring safe freezer storage. Safe long-term storage without the loss of vitamins and nutrients. Hygienically pre-sealed and flat shape of the bags makes it quick to thaw breast milk. Large area for labeling and dating the bags makes it easy to keep track of your stock of milk. Transport pouch keeps the breast milk bags organized and clean.