My bud, Caveman, bought one for him and one for me.
Reda Gas Can
http://www.redagascan.com/
It's super cool. Built really durable, compact size, fits perfectly in my HD saddle bag, holds 1 gallon of gas, and won't spill when you pour it.
The nozzle has a valve in it. Once you flip the can upside down and place the nozzle into your filler neck, you place it into the groves to hold it in place, then push down on the neck. This opens the butterfly valve at the base (green) of the nozzle releasing the petro.
Very cool and will use it on my road trips. Just in case.