DIY Black Straws Flash Snoot Grid

I wanted to do some more interesting effects with my two flash set up, but there's no cheap snoot that would fit my canon flashes. I came across this DIY site that seems pretty interesting

http://lightingmods.blogspot.com/2007/06/diy-black-straws-snoot-grid-part-1.html

http://lightingmods.blogspot.com/2007/06/diy-black-straws-snoot-grid-part-2.html

This is where you can concentrate all the light to one one spot only