Magnetic Pen Holder
This is a nifty little magnetic pen holder. It holds two pens and requires two 19mm circular magnets, also called "magnetic buttons", that can be found at walmarts or hobby stores pretty cheap. I have a ton of pens and white boards and this helps me keep track with all my pens. No more searching for just the right color, the Magnetic Pen Holder is here to save the day. Works great with thinner expo markers. Other pens with a diameter of about 11mm should work as well. Just glue the magnets in the holes and you are done!