mine's the round style drain pan and my 5gallon is an old potable water can and not a gas can, but same ideaI have one similar to this that I use.
http://www.amazon.com/dp/B000HEBYYU/?tag=atomicindus08-20
When it is full I pour it into an old 5 gallon jerry can. When they are both full I take them to auto zone and empty them into their recycle tank.
grab the next couple old plastic gas cans you find on the side of the road. Spend the $5 on a new cap if needed. Done
