You may want to pick up a hand crank "liquid transfer pump". I got mine at Ace Hardware. It was about $30. I've found it to be incredibly useful. I use it to fill up my gas cans from the car instead of taking the cans to the station, and it'll also let you safely use fuel from your vehicles (no siphoning).

It sounds extreme, but I like the fact that I can fill the gas cans without people knowing I'm doing it. Gas is currently hard to find and lots of people are without power. I'd rather not advertise the fact that I'm buying more gas than I need for my car to take home to my generator. :-)