Philips Avent Breast Milk Storage Bags protect and safely store your precious breast milk. With reinforced side seams and dual layer bag, they are strong and durable, and the double zipper ensures no leaks. They are pre-sterilized for immediate use and the self-standing bag is easy to use with a wide neck for easy filling and pouring. At the top of the bag you can note the date and time of the milk expression for easy breast milk storage management. You can use them for storage in the in the fridge or freezer. Includes 50 pre-sterilized bags. Model number: SCF603/50