A very nice lady on the customer service line for Spectre, the gas can maker, told me that gravity flow spouts compatible with their cans were still legal in Canada.
Since I wasn't far from the border, she suggested Canadian Tire, an auto parts store up there. Next trip up, I came back with some of the gravity flow spouts which actually worked. Yeah, gas will overflow when you try to pour five gallons of gas in a tank which has less than five gallons of capacity remaining.
It isn't rocket science. But the EPA approved alternative is so Rube Goldberg in design that it will start leaking gas the second or third time you use it. So it is actually worse for the environment than the Canadian gravity flow version which can't be legally sold here on this side of the border.
Guys, I’m missing something here. I have a 2 gallon plastic gas container that I bought a couple of years back at Home Depot that I’m very happy with. It seems you’re referring to a problem I haven’t seen. Can you enlighten me a bit? Thanks