It's been suggested before, because it is a good idea.
Another common fuel related suggestion is the ability to dump fuel, so we can easily manage our fuel levels without having to do extra jumps just to waste fuel.
An easy solution to both is to have the ability to package fuel into canisters. These could be dumped, given to other players, or sold to a station. It would make fuel scooping CGs a possibility.
Being able to fill up a tank using hydrogen fuel canisters in your hold would also be a good thing.