Their is not really a basket its more like a net bag with pockets. It has room to hold you water bottles, the spray fan bottles and maybe a shopping bag with something thats squishabable. I have seen people hang their bags over the bar but when the kids jump out it will likely tip over because the strollers are light. If its a small cooler you maybe able to have the canopy open and put it on top, this may not work at MGM though because the canopy will fall in towards the seat. HTH