Medela Thermal Cooler Bag - Ideal for transporting breast milk The Medela Cooler Bag is ideal for transporting breast milk in conditions of perfect refrigeration and safety. The thermal insulation will allow you to keep the expressed milk on the way to and from the office or nursery. Enhance your breastfeeding experience. Mums love the Medela Cooler Bag to keep their milk chilled on the go. This Medela cooler bag and bottle set can be used as a secondary container to transport your milk from work to home. It can also be left at the nursery. Advantages of the cooler bag The Cooler Bag keeps breastmilk fresh and safe wherever it needs to be transported. The contoured cooler is specially designed for Medela bottles and optimizes the shelf life of breast milk. The thermal insulation inside the bag will keep the expressed breast milk fresher for longer. It comes with four Medela breast milk bottles and a separate cooler.