Re: Fuel bottle/Fuel tank idea
Actually I just use the bottle as is other then putting a better O-ring on the cap.
If you can find them get the orange colored hose washers, they're made out of gasket material not rubber or plastic like the black or greens ones. Home Depot carries the orange washers in where the plumbing fittings are.
Also, don't use the white plumber's tape, get the yellow tape for gas pipe.