From breast to bottle to storage. Pump and store with Dr. Brown’s Breastmilk Collection bottles, right from many different types of breast pumps. Each Breastmilk Collection bottle is clearly marked to measure collected milk volume, holding up to 4 oz/120 ml of breastmilk. Just add Dr. Brown’s bottle parts and nipple (sold separately) for feedings right from the same bottle. Pump and store in the refrigerator for upcoming meals or freeze in the bottle for future use Included are four (4) Storage Travel that tightly seal the bottle, making storage and transport simple Dishwasher (top rack) and sterilizer safe for easy cleaning BPA-free, 0m+