HAND MIXED 2 Ink Empty Marker, Back Hole FOFS and you can see from

and you can see from the picture which colors this crayon specifically has

side-mounted mixing tray

there is a rubber pump so that you can build up pressure in the pen and thus get a perfect flow when writing

Henry Chalfant

HAND MIXED 2 Ink Empty Marker, Back Hole FOFS and you can see fromHAND MIXED has developed these revolutionary pump markers with a broad nib and two separate marker bodies, allowing you to have two colors in one marker. HAND MIXED has designed the marker, 3D printed the marker head, and collaborated with MOLOTOW on the other components of the marker. The marker comes empty so you can fill it with suitable ink or paint yourself, such as HAND MIXED Ink or Molotow ONE4ALL refills. If you want to see more of HAND