This set of Lansinoh breastmilk storage bags is perfect for any nursing mother. The bags are pre-sterilized and come in a pack of 50. They feature a zip closure and are leak-proof, making them ideal for storing and transporting breastmilk. The bags are clear in color and come with bonus pump adaptors. They are disposable and freezer-safe, making them a convenient and practical addition to your breastfeeding routine. The bags are made in Thailand and are BPA-free and BPS-free. They are self-standing and can be pumped directly into the bags. This set is a must-have for any nursing mother who wants to store and transport her breastmilk safely and efficiently.