These are a really great price if you are after some. They will write on just about anything and your getting 5 here plus a free eraser if you make a mistake.
Pressit CD & DVD Labelling Pens - Set of 5 Pens (3 Colour, 2 Black) + FREE ERASER PEN
Designed specially for writing on compact discs and guaranteed 100% safe
Permanent, non-toxic & safe
5 pens per pack (2 x black, red, blue, green)
Integral pocket clips
Just write straight onto the disc or a disc label!
The price makes it equivalent to 33p per pen, bargain in my opinion.