Ameda Breast Milk Storage Bottles can be used to safely store expressed milk in the fridge or freezer. They are clearly marked to measure your milk, and have space for clear labeling. They are found in and are compatible with all Ameda HygieniKit® Milk Collection Systems. Easily collect and store pumped milk. Safely store in refrigerator or freezer. Made of polypropylene, without BPA and DEHP. Stop wasting valuable milk and creating messes by limiting the amount of times you have to transfer milk with these storage bottles.