Is a leaky can with AvGas to be preferred?
I think _all_ leaky cans are to be avoided - those filled with precious delicious liquids (Glenfiddich, Chateau Mouton Rotschild, ...) perhaps even more.
More to the point: here in BE, most fields have an AvGas pump but MoGas pumps are rare. Microlighters have always brought their own. I know of one field where someone from the club will drive an open pick-up to the nearby filling station with 5 or 10 50-litre containers... On busy flying days, a second run is made around noon.