I have more gas cans than I should have. I lose a vent cap or a disc seal and can't seem to find either for that particular can, and so I have to buy another gas can with yet a different vent cap or disc seal.
But the last one I bought is a @#$%&* nuisance. Both the vent cap and the spout ring have stops. To unloosen them one has to raise a plastic doohickey to get over a little wedge in the body of the can. These are bad enough in the summer when one can take off work gloves, but it is finger-numbering when its below 20° F.
I finally took a Leatherman saw to the tabs and got them out of the way. However, the designers overlooked one safety feature that is lacking in almost all gas cans. It takes a lot of effort to put the spout on just so to make sure the can doesn't leak as one pours gas into a tank.
I talked to Scott Cyr at Denny's Lawn and Garden about this. He said he had never found a can that wouldn't leak at the spout. I thought I had found a way to reduce the leaking. I keep the spout a quarter turn counterclockwise from where I want it as I tighten the cap. When I think I have it as tight as possible, I turn the cap again letting the spout turn also.
Today, as I poured gas into my lawn mower, I noticed that I had a puddle of gas on the driveway!
Safety engineers! Product designers! Before you fiddle around with making your gas cans difficult for kids to open, how about making sure that adults don't spill gas?
