Size is ideal for feeding, storing and freezing small amounts of breastmilk. In refrigerator or freezer. Pump, store and feed with one container. Not recommended for use with the Single Deluxe breastpump. Easy measurement of pumped breastmilk. Medela's signature bottle design allows moms to store their breastmilk long-term without losing any of its natural beneficial properties. Containers and lids for easy collection, storage, and feeding of breastmilk.