The Breast Milk Storage Bags have been hygienically pre-sealed with durable material and double-zipper protection to prevent leaking. Special processing can prevent damaging breast milk at the source, ensure the safety and hygiene of the milk storage bag, and protect the health of each baby. Self-Standing design, stand or lay flat for compact storage, saving space, easy to put the breast milk storage bag into the milk warmer. The design of the spout is convenient for you to pour out breast milk, avoiding the opening from being oversized and causing waste. Each box includes 60 pieces.You can choose how many pieces are packed in each box(30, 60 or120).