CD cases as SHB traps?

[Rob-bee]

I have seen posts stated the use of CD cases as traps but cant find any information with the search feature. Can someone provide me with a link or description of the trap.

When searching the web for information I found this site:

http://www.beekeeping.com/articles/u..._intruders.htm

[Will]

http://www.beetltra.com.au/index.php