Cavalier King Charles Ruby My Faithful Friend 15oz Coffee Mug - Decorated in USA. These gorgeous mugs have a wonderful painting by renowned artist Tamara Burnett on one side, and show three predominant traits of the breed on the other side. These mugs hold 15 ounces of your favorite beverage, are made of earthenware and are top rack dishwasher safe and microwaveable. They are printed in the U.S.A.