The Haakaa silicone milk bags are an environmentally friendly alternative to conventional disposable milk bags. They are a convenient way to store, transport and warm expressed breast milk. They can be used over and over again, which helps to reduce the amount of single-use plastic waste. application The milk bags can be safely placed in the refrigerator as well as in the freezer and can be stored lying down or standing up. Simply fill the bag with breast milk and then seal it with the leak-proof stopper. If you want to use the milk, you can simply place the whole bag in a water bath and warm the milk gently. The closure has a handle, which makes it easy to take the bag with you. The volume information on the bag is only approximate. As the bag is soft, it is not possible to give an exact quantity.