The Haakaa Silicone Storage Container is perfect for storing breast milk, liquids and snacks, or taking food on-the-go! It's completely airtight, keeping food fresh and preserving the beneficial properties of breast milk that are so important for our growing little ones. The most exciting feature of our Silicone Storage Container is that it is fully compatible with our Gen. 3 Breast Pump and the rest of our silicone bottle attachments! With a quick twist of the top, you can swap out your storage container lid for any of our range of optional interchangeable attachments (each sold separately).