The Cooler Bag of Medela It's essential for mothers on the go who need to keep their milk fresh. With bottles, you can use it as an additional container to transport breast milk from work to home. This bag can also essere Stored at Armella. The cooler bag preserves the integrity and freshness of breast milk, wherever you are. The ice pack, whose shape is adapted, was specifically designed for bottles of Medela and increases the shelf life of your milk. The insulation inside the bag keeps your expressed breast milk fresh longer. The bag comes with four bottles of breast milk. Medela and a separate cooling element.