Cool Bottle Bag By Munchkin 

Munchkin's Cool Bottle Bag is a chic, multi-functional way to keep milk bottles cool and fresh during long stretches of time. This adjustable bag expands to hold up to 4 bottles and then folds flat for easy storage. With various compartments to store kids' bottles and feeding accessories, this bag makes being on the go easy. Finally, the bag is made of durable material, so it's super easy to clean - just wipe with a damp cloth. 

Holds up to 4 bottles including wide neck styles and Dr. Brown's 
Includes removable ice pack to keep bottles cool 
Folds flat for easy storage 
Versatile bag also holds lunches and snacks 
Easy to clean