Now, I had always thought of these as a sort of novelty project, a ways for aspiring luthiers to "dip their toes in the water" so to speak. But apparently there are some who take these things seriously- very seriously, to the point of having a festival in New Orleans every year. This year it's a $25 livestream tonight, March 20 (the second night).
But for free, you can watch the esteemed Ms. Fish at the 2019 version of the festival. You can skip past the 1-minute long intro:
OK, technically, hers is made from an old oilcan, not a cigar box, but I guess that qualifies,too . . .
Gotta call up "American Pickers" and see if they have any old oilcans . . .