Medela Breast Milk Cooler Set With 4 Bottles.The Breast Milk Cooler Set is great as an extra set for bringing to work or school to store pumped breast milk or for leaving at daycare with your baby. The contoured cooling element is designed specifically for your Medela breast milk bottles. Authentic Medela spare parts are compatible with Medela breast pumps. Made without BPA. Safe for you and your baby.Includes: - Cooler and contoured ice pack: Perfect for transporting breast milk - 4 Breast milk bottles 5 oz. (150 mL) for breast milk storage and feeding