I have several gas cans of varying capacities. They all have some strange combination of interlocks that must be twisted, pressed, or otherwise manipulated to release the gasoline. The main feature of all of them seems to be that, once you have figured out the proper sequence of manipulations and contortions required to open them, they spill gasoline all over the flipping place. The gaskets don't seal, and the interlocks themselves aren't liquid tight. You definitely don't want to attempt refueling some hot OPE with one of these (I know, you're not supposed to do that anyway). In addition, if you're concerned about emissions/pollution, having gasoline slopped every which way evaporating into the atmosphere doesn't help much. I guess I'll just get funnels that fit everything I have that needs gasoline, and do it the old-fashioned way.