Anyone ever use these?

[fishyone]

I found these on ebay and was wondering if they would work as well as the hard plastic diffusers.

http://i20.ebayimg.com/04/i/000/8f/94/1457_1_b.JPG

[JackProton]

Looks like a plastic version of the hankerchief trick.

[scot079]

that should work just fine, looks similar to something lumiquest makes