We bought bag is its large size, in fact it can server for 2 children no problem with zipped closure that can be opened on the bottom that can almost double the size of the bag. It serves us for our daughter and our 2 year old boy. Its large volume allows us to take the milk carton, the bottle of water bottles, extra clothes etc ... In addition it has a lot of accessories integrated (anti-bacterial box to the nipple, several pockets ...)
His faults: - The price - The weight is a heavy can even empty.