On Amazon.com where they are offering this Kiinde Breast Milk 6oz Storage Twist Pouches 40-Pack
for just $6.95 (regularly $14.99).
These twist pouches allow you to collect, store, prepare and feed all while using a single reusable pouch. Each pouch features a secure threaded cap that eliminates the risk of leakage and the pouches twist-lock onto pumps from ALL major manufacturers (using the appropriate adapter which is sold separately). The bags are pre-sterilized as well.