There is one of the older ones at my work where you have to pull back the nozzle to get the fuel out. Lift 5 gallons with one hand and try to use the other to pull back the nozzle then gas goes all over the place because the nozzle is partially blocked by the "safety". I put hose clamp on it to hold it open and use two hands to lift it. It still goes all over so you must use a funnel. I have one i bought for home years ago that you couldn't get the gas out no matter what you did. A half inch drill bit got it to work! How are they safer if you spill gas all over trying to get it out.