Most runners have faced the problem of not having an appropriate key holder for running. It is too bulky to bring your whole set of keys with you for your run, or sometimes even on a quick errand, yet, bringing one key raises the risk of losing it.
Designer David Tsai has finally solved the problem with his Keon V1 key holder. The key holder, which is 3D-printed, holds up to two keys on your fingers. It is essentially a ring that can easily slip on your fingers with a key attached. You will always know where it is, barely feel it and be able to go on your way without a worry in the world other than catching your breath.