Lansinoh breastmilk storage bags have been developed specifically for the freezer and can also be used to store your breastmilk in the fridge our manufacturing process enables us to produce these medical grade bags without using plasticisers so substances that could be harmful to your baby will not leach into your breastmilk leak proof pre sterilised double zipper for a secure seal convenient write on tab above fill area to eliminate potential puncture made from food sa