Say, I'd like to know where you got the notion.

This is one of my favorite little do-hickies that I use when pulling elastic through a casing.  This bodkin is so much better than the old, time-consuming safety pin method and doesn't come un-done like the tweezer-type of bodkins.

I just thread my elastic through and tie it in a knot (my bodkin is a little bowed from all the use).

Start threading it through the opening in the casing...

Walla! This took about 25 seconds! I love it!

Unfortunately, you still have to do it the old fashioned safety pin way if you are making something with a small opening (like the end of a sleeve or something).  But this is definitely a neat thing-a-majig!