If you can build one from CPVC or PVC do it. I've had nothing but problems with those tubes.
Cut slots in the plastic pipe, 3/8" apart with a hacksaw blade (perfect width), 1/3-1/2 thru. You don't have to glue any of the fittings as they fit tight enough for mashing. PM me if you'd like to see how I put mine together.
Or use a soft copper coil if you have a round cooler