How do you colse your gap in your teeth with string?

teethgap.com sells a product called teeth effect bands which will close your gap. Teeth Gap uses special Compressor bands called Teeth Effects to draw your teeth together. They provide "the pull" necessary to move the teeth quickly, and in the right direction. You stretch the teeth effect band when you put it around your teeth. Since the band is stretched out it pulls the teeth towards one another because it wants to contract.