lol. I don't know how a clumsy stick thing is more convenient than a little slip of sandpaper. Also just go to the dollar store and for $1 get one of those sharpening stones and you have a conditioner for your glass pot calls.
Scrap piece of sandpaper and sharpening stone- Total Cost $1
Primos Stick - Total Cost $10 (I think)
Bloody gimmick to soak money out of foolish turkey hunters IMO.