The Cooler Bag is the best way to keep things cool on the go! It holds six small baby bottles or 12oz cans and attaches seamlessly to the frame of your stroller. Compatible with most strollers, the Cooler Bag is a must have for parents who want to keep things cool! The Cooler Bag is compatible with the City Mini, City Mini Double, City Mini GT, City Mini GT Double, City Premier, City Select, City Select Lux, Summit x3, and Summit x3 Double.