Nothing weird about them just the typical plastic five gallon gas jugs with the hard to use spring loaded safety filler necks. I have two of the JR’s and two of the Eagles but prefer the plastic jugs.Those are weird gas cans. The only two types I know of are JustRite and Eagle.
Will static electricity be more of a problem with metal fuel cans?either 3 or 4, old metal 5 gallon cans.