PodPocket is my new favorite accessory; I first heard about it from Matt Gemmell on Twitter. It's a little case for your AirPods with a hook that you can use to clip on your key ring, belt loop, or whatever. The top and bottom of the AirPods case is exposed so you can open and close and charge, respectively. It's a really nice way to carry your AirPods while keeping the case pretty clean and scratch-free.