Securely store up to 210 milliliters (7oz) of breast milk with Unimom Storage Bags. Stay organized with the neat labeling system. These freezer safe, self-standing bags can be stored standing vertically upright or you can lay them down flat horizontally for space saving storage. Don’t worry about breast milk leaking or spilling. A durable pre-sterilized plastic makes bags leak proof. Amazing features in a compact and convenient design.