This Medela Breastmilk Collection bottle set includes 5 bottles with lids, each with a capacity of 150ml or 5oz. The bottles are designed for safe and convenient storage and feeding of breastmilk, and are compatible with Medela breast pumps. The set is a must-have for any breastfeeding mother, and is ideal for use at home or on-the-go. The bottles are made from high-quality materials and are easy to clean and sterilize.