I purchased these after giving birth to twins to deliver expressed breast milk while they were in the NICU. I have one box left over, so I'm selling it. The midwives said, "This is the cutest storage bag I've ever seen! So soothing!" If you have a Pigeon breast pump, you can pump directly into these bags, which is very convenient. *Please check online as it may depend on the type of breast pump before purchasing. 【Product Overview】 Pigeon breast milk storage bags have a capacity of 120ml (4oz) and come in a pack of 25. They are made of BPA/BPS-free materials and are sterilized with gamma rays for hygienic storage. 【How to Use】 You can transfer expressed breast milk into these storage bags and freeze or refrigerate them. The easy-to-use design allows you to safely store breast milk. 【Product Benefits】 These storage bags are designed to support breastfeeding and are easy to use, making them ideal for busy moms. - Brand: Pigeon - Product Name: Breast Milk Storage Bags - Capacity: 120ml/4oz - Quantity: 25 sheets - Features: BPA/BPS-free, sterilized with gamma rays for hygienic storage - How to Use: After pumping, transfer breast milk to the storage bag and freeze or refrigerate - Country of Manufacture: Thailand Thank you for looking.