This feeder is made from a Slinky! You can purchase it for right around the $20 mark from Veseys, but we're betting that there might be some DIY potential in this project.
This project could easily be recreated with a wire hanger and a Slinky. As long as each end of the slinky is secure it'll hold peanuts or large feed. Perfect for big birds that like to do some digging. You could even take this one step further and use a paint like Plasti-Dip to rubberize the whole thing and make sure it's weather proof!