Nanobebe breast milk storage bags are designed to prevent both spillage and spoilage, and most importantly, to protect your precious breast milk nutrients. The innovative design holds milk in a thin layer to cool and thaw quickly in order to reduce bacterial growth. Quick cooling and thawing (2x faster than standard storage bags) protects nutrients from damage due to overheating. These Mom’s Choice award-winning storage bags are durable, leak-proof, made from extra-thick plastic, and feature a double-zipper closure. The space-saving organizer, sold separately, keeps your breast milk neatly stacked and helps you track pumping order with a first in, first out method. They’re the ideal essential to streamline your pumping routine. Gender: unisex.