I had turned this little bowl (4" dia) a couple of years ago. While turning the foot broke off, and so I sawed it in two to have a look at the cross section. I threw one half in the burn pile and the other half I put on a shelf to remind me.
This year I re-united the two halves after cutting 1/8" from each half and inserting a 1/4" strip of walnut, and gluing the three pieces together. Moutned it in a jam chuck and turned a new spigot on the bottom; trued up the outside; then mounted it by the spigot and turned the inside true. After sanding through the grits, I appled walnut oil.