[sammyg2]

Note that ALL gas cans can create static build up and ignite when not properly grounded. Doesn't matter if metal or plastic.
Filling a gas can in the bed of a pick up (with a bed liner) is a good example of what not to do.
Same can happen when pouring gas from a gas can, but the flow is usually slower and not quite as dangerous.

The can needs to be touching the ground when filling, and the nozzle needs to be touching the can.
Failure to do that can cause a static spark to jump and static sparks are really, really hot. Way above what it takes to ignite gasoline.