There are two versions of the Zoot Snoot, one for large shoe mount flash heads and another for smaller ones. It costs $23 and has a small hole at one end making it possible to clip it to the outside of a camera bag. The Zoot Snoot is a good value if you need an inexpensive, lightweight, light modifier and prefer a circular light pattern.
The one drawback is because of the size limitations to individual Zoot Snoots, users who work with multiple flash configurations may not be able to use the Zoot Snoot on the particular flash they want for a specific setup.
The manufacturer provided me with a Zoot Snoot for the David Busch Quick Snap Guide to Photo Gear.
http://zootsnoot.com/index.html