The Bike Chain Keychain
There always seems be some sweet keychain device coming out that can detect your ballooning BAC, or control your house lights, but keychains themselves have been static products for decades. Despite a complete lack of innovation, a guy from Budapest has just made your entire keychain 1,000 percent more efficient. Meet TIK, "the world's leanest keychain."
Removing all the unnecessary mass from the keys' bodies and attaching them to a ten-speed bike chain, TIK also streamlines the process of finding the correct key. Since it's based on a chain, it's easy to have a custom length of keys to suit the amount of locks in your life.
Ethan Wolff-Mann doesn't mind the jangling of keys, but like all-things bikes, he's into this.