There are a total of ten NCIS Gibbs’ Rules. With this NCIS Gibbs’ Rule #2 mug, remember the next time you go out on a case: Always wear gloves at a crime scene. It’s good advice for anyone who wants to become an honorary member of this elite forensic crime-fighting team. This NCIS mug with Gibbs Rule #2 is made of white ceramic and holds up to 11 oz of your favorite brew. Give this NCIS coffee cup as a great NCIS gift, or select one to satisfy your own NCIS obsession.