Evenflo Feeding's Advanced 5 fl. oz. Milk Storage Bags are perfect for collecting, storing and freezing your precious breast milk. Our eco-friendly bags have 30% less material, reducing waste. They are made from a durable, high-density military grade material for extra strength, but are thinner for quicker freeze and thaw times. The special design and wider seams allow for a stable, self-standing position when filling. Our SafeZipTM dual track zipper helps to ensure your milk is sealed securely for storing. The perforated, tear-off top creates a convenient pour spout when transferring milk from bag to bottle. Our bags also include adapter holes that easily attach to most standard neck breast pump adapters. Made in the USA. We are honored to support you on your breastfeeding journey. For over 30 years, Evenflo Feeding has created and continues to develop products to help you along the way. You may feed challenged at times, but remember you are a strong and capable mommy who can achieve your breastfeeding goals! Good luck to you, mom, as you continue on your amazing adventure of motherhood!