Our breast milk bottles are a perfect complement to your breastfeeding experience. Medela's breast milk bottles are compatible with all our breast pumps and Calma, making it easy to pump, store, and feed using the same container. This means not a single drop of your precious breast milk is wasted and you have less washing up to do.Features:Minimum pouring required - one container for expressing, storing, freezing, and feeding breastmilkEasy to cleanDishwasher and microwave-safeDurable - no cracking or shattering when droppedSafe materials for you and your baby