I belive I have one better! I guy at our field suggested running two fuel lines from the gas cap. One to the tank and the other to the muffler vent. When the tank is full, instead of running thru the muffler or into a smaller container, it will flow back into the original gas. The only cost was additional fuel line and the inexpensive GP fueling system for the cap. This is very convenient and I don't have to carry around another small container in my already full flight box.