The best way also happens to be the cheapest way. Tie two bar oil jugs together with about 12-16" of small rope, I prefer the round bar oil jugs, or at least the taller square'd off ones to the newer short rectangle jugs. Anyways, fill one with mix gas and the other about half way up with your bar oil ............. and your done.
What makes this concept better than most any other is you can hang the jugs over your shoulder, over the seat of a ATV, hang it from a tree so it won't get lost or smashed by vehicle that didn't see it on the ground ...................... and their free and usually plentiful. If you do smash a set or one, you don't care so much as if you just smashed a $15+ dollar piggyback jug. They pour easy and great and don't have the stupid snorkel parts that get broken or cracked all the time. You can make up multiple sets for free.
My experience and opinion,
Sam