Whiteboard holder for markers and brush

Needed a custom whiteboard holder so I designed one. We use a lot of whiteboards since we had our walls painted with a special surface to allow us to write anywhere. It is a new office so I wanted something better than the afterthought at Staples.
Simple, keeps the brush accessible and allows you to see the marker colors. I store them with the caps down to keep the tips moist.
Use double sided tape to attach to the board, or to the wall next to it if you use tape that will not take the pain