Is your spare tire mounted on little tee nuts? Check it out

Interesting! But I have a gas can with a no-drip spout that really, really works. (California mandates these, and for once the regulators have gotten something right.) . It is a one gallon red plastic thing with a strong spring loaded spout. So that is why I am working on a gas can mount that sits securely on top of the tire.

As promised, I will post this project, but not for a couple of weeks -- family obligations are getting in the way of garage time. Sigh.