This is kind of a silly question, but why does the Sebenza come with that little key fob sized lanyard?

I found a description of how to tie the knot on http://www.chrisreeve.com/ , but can't figure how what value there is in a little key fob looking thing.

I found this site that describes the use/advantage of lanyards very well:

http://bill-hay.com/Lanyard.htm

Just wondering.