Features: Food Grade MaterialMade of PE + PET food grade material, BPA free, and sterilized by gamma ray, more safe to use. 220ml Large CapacityCan store 220ml of breast milk, and you can see the different capacity scale clearly on the milk storage bag. Double Zipper Seal DesignDouble zippers seal, can avoid leakage effectively, guaranteeing the breast milk isolated from outside air. Freely Control the Rate of FlowThe base of breast milk storage bag has a preset opening and when you cut it off, the breast milk can flow extremely large or small. Recorded ConvenientlyYou can record the name, date and the storage capacity of breast milk, so that you can management conveniently. Specifications: Quantity: 30pcs/ 50pcs/ 60pcs(optional) Material: PE + PET Capacity: 220ml/ 7.5oz Packing List: 50 * Piece of Breastmilk Storage Bags