Needs to be 3ft-6ft long, diameter about the size of a quarter, (To use as comparison graphite and carbon fiber golf clubs)Please give links to stores if possible
You can buy light gauge wall aluminum tubing in 3/4 and 1 Dia.s at large hardware outlets.- (Home Depot, Lowes.)
The ice chest probably uses styrofoam as its insulation, so it really would depend on which one had the thicker walls, since insulation value varies depending on thickness.