Fuel spilling

has anybody ever come up with a way, besides not filling the tank up:toothy10: with a way to stop the fuel from spilling down the side of the car while cornering? some kind of one way valve in the filler tube kind of thing? years ago I remember seeing one on a website, might have been Laysons, but it was only for early a-bodies. Anybodie have ideas?? Really hate seeing "fuel drool"....