Fellowes® Partitions Additions™ Pencil Cup, Graphite

Pros: all the markers are in one place and visible.
Cons: doesn't hold spray cleaner bottle or erasers.

I use it next to the dry erase board to hold all the markers. It shows what colors are available all in one place. It's easier for everyone because you don't have to search below the dry erase board for a marker. For the longer boards, put one on either end.