Product Overview: The Medela Breast Milk Storage Bags offer a reliable and hygienic method for storing breast milk. Key Features: ‣ Double-zipper closure to prevent leaks and ensure freshness. ‣ Stand-up bottom for easy handling and pouring. ‣ Pre-sterilized and disposable for convenience. Specifications: ‣ Material: Food-grade, BPA-free plastic. ‣ Size: Standard size.