The reliable double zip anti-launder closure, for una Perfectly safe storage with a secure opening, the pre-sterilized bag is intact before its first use, for guaranteed hygiene. With the reinforced side seams and lining of these bags, you can essere Ensure milk is protected in the refrigerator or freezer. Easily fill and pour milk. This sturdy bag stays stable when placed on the table, while its large opening allows you to easily fill or pour out its contents. It's also great for flat surfaces. una easy to store in the refrigerator or freezer