I carry a gas can on my bike, but it is empty. Just can't see having a gallon of gas sloshing around back there in an unvented space. But I do like the idea of having a can in case someone runs out of gas. I use this one. It is a single use, cardboard with a plastic spout. Kind of reminds me a bit of a milk carton. about an inch thick and maybe 14 inches long.
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