These pens come highly recommended by my favourite planner girl - Desley of "desleyjane plans". The colours are delicious and although they are perfect for dot drawings they can be used for so many other things, like planning for instance!
Color (or Colour for us Aussies) dot pens contain water based pigment ink, that is lightfast and odourless. They have a dual tip marker with a 0.5mm fine tip on one end, and a flexible dot tip on the other. Dots of various sizes can be drawn by adjusting the pressure applied to the pen tip.