My Garvin works fine with a plastic one. What problem do you see having with a plastic jug?
Must be a California thing...plastic jugs, metal cans... must not comment......
I see. Try this site: http://www.offroadrecovery.com/ this is where I bought mine and it looks like they have several choices.The OR-Fab rack grabs the lip on the bottom of the metal jery can for the bottom support and the pinches throught the loop handle at top to secure.
The bottom lip is the result of the seam beatween the bootm of the can and the sides. Most of the plastic ones don't look like they'd have anything to grab on the bottom as blow molded stuff is typically radiused.