Medela breast milk bottles are specially designed for safe long-term storage of breast milk. Breast milk could be collected directly into containers and stored until needed. Medela refillable bottles with caps are free of harmful chemicals and are compatible with all Medela breast pumps. Ideal for pumping, storing and freezing breast milk and feeding your baby. Dishwasher safe and microwave and freezer safe. The set includes 2 containers (bottles) of 250 ml.