Loulovecar
The cooler that I purchased is made of a soft insulated material that collapses. It has a telescoping pop up handle (like the ones on luggage) and 4 wheels on the bottom. Mine will hold 60+ cans but when not in use, it folds to approximately 12 x 12 x 4 so very compact.
I live in Oregon and purchased mine at a store called Shopko for $19.99. I think it will work awesome to pack sunscreen, towels, water, etc. on and off the ship.