The milk bags are pre-sterilized, which means that they do not have to be washed before use. They are very practical if you don't have so much space, because the milk bags can all be placed on top of each other. The wide underside ensures the stability to leave it standing. Thanks to the slanted tip, the milk can be transferred very easily and without loss into a vial. The date and quantity of the milk may be written on the mother's milk bag. In addition, the milk bag is equipped with a zip closure, which allows you to easily open and close the bag again.