We just got back and also used two Volo strollers, which I LOVED. Anyway, I used insulated lunch bags and just hung them on the handles of the strollers. They were large enough to hold a LARGE drink or two water bottles. I guess because they hung low enough. I never had to worry about tipping the strollers over. The lunch bags didn't have to be taken off either to fold up the stroller! (Got lime green ones from the local Dollar Tree for $1 each.) This was a great simple and cheap solution. Also, I didn't have to worry about it coming un-velcroed (is that even a word

).