I came up with this idea because I try to come up with a free way to make just about everything.
Step 1: What You Need
Wine corks, stainless wire, wire cutters.
Step 2: Push Wire Through
Find a straight piece of stainless wire a little longer than your cork. Put a hook on one end with your pliers/wire cutters. Push it through as centered as you can on the cork. Pull it all the way through where the hook is buried in the cork. Now cut the wire just long enough to put a second hook in it.
Step 3: Now You're Done
Push the wire back and forth a couple times to where it can later be done by hand. You can now add this to your fishing rig.
Some other ideas might be to spray paint them a fluorescent color or even glow in the dark if you will be night fishing. Add weights to the wire if you so desire. Thanks for looking!