Whatever works

Whether it was meant to hold pens, pencils, and whatever else is necessary on a desk an item like a cup can serve more than one purpose. When you are sitting at your desk and realize that you don't have anything to put all of your writing utensils or office supplies, then you make use of whatever you have. In this case I happened to have a drinking glass that didn't belong with the other drinking glasses and like that voila!, a magical pen holder.