PIGEON... Your Breastfeeding Companion The milk you express for your baby is very precious, therefore it is very important to store it carefully and keep it well preserved. PIGEON's Breastmilk Storage Bags are pre-sterilized with gamma ray and are BPA-Free. It has a convenient pour spout for transferring breastmilk, a waterproof "write-on" tab for mothers and a unique double zipper seal for extra security. For ease of use, the storage bags are self-standing and milk can also be thawed easily by storing flat in the freezer.