don't know if it'll be small enough for you but I noticed this a couple years back and it works great to keep things cool.


go to the regular dollar general store (maybe other stores have it also). they have a small, cheap Styrofoam cooler for a dollar. then if you have a family dollar nearby (again, maybe other stores have something similar), get one of their soft sided coolers that are about $10. the Styrofoam cooler just fits in the soft sided cooler and together things stay cool for a good long time. sunday was my bike riding day and I would put a couple of frozen bottles or water in with a couple bottles of whatever else I was drinking. everything stayed pretty cool. even when I left the cooler(s) in the bed of my truck and opened it the next day, whatever was left in there was still kinda cool.