1、Date Noting: Our breast milk storage bag has a location on the front for you to write down the date and volume, so you can marking it in time after you finish storing. 2、Prevent Spillage: This breast milk storage bag has a zipper sealing design to keep your breast milk freshing and prevent spillage simultaneously. 3、No Leakage: The breastmilk storage bag also does not leaking, with reinforced side sealing and high strength to provide greater stability. 4、Safe Pretreatment: Angled cutouts to facilitate milk evacuation. These bags are pretreated, safe and can be used with confidence. 5、PET and PE Material: Our breast milk storage bags are made of PET and PE material with excellent craftsmanship to achieve long term use. Item Type: Breastmilk Storage Bag Set Material: PET, PE Contains: One box (contains 30 bags, 220ml) Size: Approx. 100 x 180mm / 3.94 x 7.09in 30 x 220ML Breastmilk Storage Bag