The project’s quite simple, and embellished with a little fabric — I’d use duct tape.
I like this idea as a way to contain my earbud cords when I travel — I use Bluetooth headphones, but I actually prefer earbuds for sound quality, especially on airplanes.
Originally, I thought I’d leave off the key ring and clip. But the more I’ve thought about the final product, I’m convinced the clip is a necessary addition. I think, at least for more manliness, I’d add a carabiner, rather than the daintier clip used in the tutorial.