If you have an indoor cat, they need something orange. This is why: http://www.explodingkittens.com/kittyconvict
That orange thing should also have some kind of identifying information. This item serves both those functions! Order it in orange and customize it with 11 identifying characters! Clip it around your cat's collar (which can now be any color).
I have also considered what your cat would want. What does your cat want most? It wants a mouse that is with them always that's impossible to catch. This looks sort of like a mouse and if it's attached to their collar, they will not catch it! Everyone wins! Order now!