I used to use "Tabacalera" Philippine Cigars, I'd hollow them out with a flat head screwdriver.
We used to call them "Goddies" as they were unslipt and much fatter than a blunt and looked like the type of cigar smoked by the Godfather.
And then fill with ground weed, they would accept upto 3/16 (5.25 Grams) of weed.
I still have the humidor, mine has breather holes in the removable base and side panels, a draw for the sponge and sponge tray and a built in humidity dial. other than that the humidor looks exactly like the one above.
The cigars were 7 inches (17.5 approx CM's) long.
To just smoke one of these cigars took 3-4 hours of constant puffing.