I made this by buying three 99-cent chalk-ready tags at Joann Fabrics.
I spray painted the middle tag silver before sandwiching these together with wood glue, just for some contrast.
After letting it dry under some weight, I drilled through the tag holes through the top two layers with a larger bit to make a holder for a small piece of chalk.
The writing wipes off easily with your hand, pants leg, or a cloth for the finicky...
I actually feel no urgent need for this object in my two-table tourney, but it was a quick and fun project for a Sunday. Might try it out tomorrow night just for shits and giggles.