I have, after reading the idea on Ranger Rick's, made several with a slight variation. I form the loop by using a small cable tie and then covering the cable tie and small portion of the loop with a piece of shrink-wrap. I can make one in about 5 minutes. I bought 2-3 phone cords at the dollar store, which can make quite a few depending upon what length you make them

One caution, I have not had the chance to break test the cable tie method, so be careful if the chance of being hung up exists.

Pete