Lansky TB-2D2C Diamond-Ceramic Four Rod Turn Box Sharpening System, Natural
The Turn Box family is a very stable and compact Knife Sharpening System.  It works well in the kitchen and it quickly breaks down for storage in a drawer.  The Turn Box family of Knife Sharpeners is also great for Out-Doors-Men on the go because it is lightweight and stores easily into a Back-Pack.  It only takes a few swipes to maintain an edge (a bit more if you have a really dull knife).