I know there are quite a few flossing devices here to designed to make flossing easier and save on string but, of course, I had to make my own :). This one features two slotted balls through which the string can be pulled in a self-locking way, so the string can be tightened and removed quickly. Besides easier usage than wrapping string around your fingers, it can save more than half of the string and now I'm much more motivated to floss regularly :).