Large Capacity: The breast milk cooling bag has a large storage capacity and contains multiple layers, which can better arrange your bag space. Zipper Design: The smooth metal double zipper makes it open without obstruction, and is convenient for loading and unloading anything you want to put in. The bottom is made of leather, wear-resistant and dirt-resistant when in use. _The baby bottle bag is made of selected premium-quality fabrics, which is safer and more reliable to use, durable and sturdy, and can be reused_ _The milk bottle bag can be used as a breast milk cooling bag, an insulated lunch bag, or a wine bag, etc., perfect for breastfeeding mothers_ Waterproof Inside: The durable and waterproof polyester outer layer and the leak-proof and waterproof lining of the baby bottle cold storage bag make it easy to clean when the milk overflows.