Lansinoh's Breastmilk Storage Bags are ideal for storing expressed breastmilk in the fridge or freezer, lying flat or standing up. They now come with a hygienic tamper-evident and secure tear-away top, with a double seal to prevent spills or leaks. You can pump directly into Lansinoh's Breastmilk Storage Bags. Just tear open the perforated seal and gently slip the neck of the breast pump into the bag. Pull down on the bag slightly to line up the pump neck with the white line on the Breastmilk Storage Bag. They're a great way (if possible) for mums to create a bank of breastmilk that can be stored until they are needed for up to 6 months. Made from food-safe polyethylene, they are tough, flexible so they won't leak and no toxins will reach the breastmilk. After use Lansinoh's bags can also be recycled, so you can use them knowing that you are helping create a better future world for your baby. Most councils will recycle plastic type 4 (LDPE).