I’ve put petrol and diesel into sandwich bags before! That was for pyrotechnics at a military vehicle events though. You can trigger a fake napalm type effect buy setting off a charge under and sandwich bag of diesel/petrol mix. Usually needed one bag inside the other as the liquids melts through the bag in about 15 mins. Makes quite a mushroom cloud when it is set off! Maybe I should have posted this on the nostalgia thread!
Anyway the point is running about with fuel in a plastic bag would be a bad idea!