Pumping is hard work, so store your liquid gold with Mamaway breast milk storage bags. The sterilized bags and the individual tear-away seals are for extra hygiene. An easy-to-read measurement marks printed on the bag and an area for noting the date of filling. The easy tear-and-pour spout makes sure the seamless transfer from bag to bottle. Designed for filling with breast milk for immediate storage in the refrigerator or freezer. And of course BPA free.