Unless you have significant medical issues, a simple, cheap dog tag will do the job. Available online or locally from lots and lots of places.
I constantly wear a dog tag hanging around my neck with name, address, phone and ICE phone.
I often ride without any other ID, other than a cell phone, which has ICE programmed into it.
I like the idea of a bone or fire hydrant tag......maybe I'll run over to PetSmart later.