"Ideal at all times: With Chicco bags, milk can be stored for up to 3 days in the refrigerator and up to 3 months in the freezer. Safe and pre-sterilized: The bags are already pre-sterilized for safe use: it is not necessary to wash them before using them No leakage: the two drip-proof hermetic closures allow for hygienic storage of breast milk, preserving its nutritional properties. Stand alone: gusseted base for easy filling of bags in an upright position Easy to pour milk: at the moment of use, simply open the practical spout to pour the milk into the bottle. Helps you in the organization: you can write down the day you pumped the milk and the amount collected Hygienic: The package allows you to keep all the milk bags clean and organized"