I am more concerned with these new portable fuel tank like the 5 gallon gas cans you use for your lawnmower gas.

They all have these new "spill proof/evaporation proof" spouts.

on most of them you have to put pressure on the spout after unlocking it for fuel to flow.

What I have found is that when filling a small lawn mower tank with a small opening you spill more on the ground that you can get in the tank.

I bought a kerosene withone of these spouts and when the electric went out this winter I tried to fill the heater and found that you could not pour into a funnel with these spouts. As a result I had to fill a pitcher holding 5 gall can (about 40 lbs) with one hand and the pitcher with the other. This is quite a feet and creates quite a mess of spilled fuel.

Anyone else have issues with these?

So I have now disassembled the spout, took the spring mechnaism out and now use a rubber stopper to close it.