Ameda 50ml MiniFil Containers are just the right size for handling small quantities of breast milk or colostrum. MiniFil bottles help eliminate the need to transfer between containers, minimizing any potential loss of liquid gold and the risk of exposure to contaminants. This is the perfect size for collecting colostrum and breastmilk in the early days of breastfeeding. Compatible with Ameda breast flanges included with the Ameda Hygienikit, Ameda Mya Joy breast pumps and all Ameda breast pumps that use the standard Ameda flange.