I don't know if anyone else has done this but this is what we did for picnics and road drinks while in Barbados. Most of us would like the use of a cooler without the travel hassle, right?. Since we all bring a carry on bag to the flight my bag was a cooler bag that collapses. I have all my carry on items as I normally would but I use this bag. When I get to Barbados it becomes my cooler. We kept it stocked with drinks, beer and picnic items along with some ice packs. It saves money, is convenient, and great for those excursion days. Since you're going to bring a carry on bag anyhow, make it a cooler bag.