A powder-dispensing system includes a first rollable member and a second rollable member. The first rollable member has a first pressure surface, a threaded interior chamber internal to the first pressure surface and an entrance to the threaded interior chamber. The second rollable member has a second pressure surface and an interior chamber internal to the second pressure surface. A threaded exterior surface external to the interior chamber is configured for interlocking/threaded engagement with the threaded interior chamber. A plurality of perforations extend through the threaded exterior surface into the interior chamber of the second rollable member.