I have a small insulated diaper bag that we carry into the parks. It holds 6 12 oz. cans with a blue ice on top and a then a few small items. Last time we took the Smucker's PB&J and were able to get 4 of them into the bag along with 5 sodas, a sippy cup, and then we also carried a groc. bag w/ non-perishable snacks. Only one security guard ever said anything to us in 3 trips, and he asked if the sodas were beer LOL! Anyway, I bought this particular diaper bag on clearance at Wal-mart for $5. I am also able to put 4 diapers and a wipes box into the outside pockets of the diaper bag. The brand is Kolcraft. HTH.