Back to "Kingpin";
The cans used in the "ridgetool" illustration, are indeed Foster beer cans, cut down,
sanded, homemaded "beercan ring" inserted, threaded top (from an aluminum container,
"newdirectionsaromatics" the 150 ml size), pressed into the beercan ring, then the ridges put in the sides; Slicing aluminum container in half also gives me the lid i use
that is held in place by the threaded band of aluminum you see in the pic.
That threaded band is the original lid of the 150 ml screw top container with the center cut out, so the result looks like a fosters can/canning jar hybrid, which is sealable, watertight,lightweight, and still retains (for the most part) the dreaded, plastic beercan liner, which I prefer to raw aluminum...