If you are gonna make a funnel, you might as well make a pretty funnel! Nice, might be just about the right size for a canning funnel or display it on the top shelf and nobody will know the difference.
Oddly enough with the 43 or so other errors I have repeated often enough to pretty well have them perfected I have never made a funnel, yet! I came pretty close for the same reason you made one I suspect. I wasn't happy with how the bottom of my pieces looked after knocking off the tenon so the obvious solution was to use a recess. Built in foot, looks nice, a handful of attractive gee-gaw things I can do in the recess to make it look finished. I too overlooked that the bottom of my bowl was getting very thin. It flexed rather easily and if I had such a thing as a vacuum chuck I would no doubt have found out exactly how thick it wasn't!
Hu