RayMay Fluorescent Board Marker Pen - 2 mm - Blue

These are awesome :D I have a mac with a glass screen, and now I can write/draw around the edge. It's easy to clean. Just a note - if you let the pen sit a while without using it, when you start writing again the colour will be darker. You do need to shake the cr*p out of it for the really powdery pastel colour, but that's a given.

I wrote on my (pine) desk to test it for lulz, it was hard to scratch off that. Water helps. Any non-porous or shiny surfaces should be fine. Windows, cars, dvd players etc... anywhere there's plastic/metal/glass. The colours are really bright. I loove it ^^