When the mug is cold, RBG wears her judicial robe. When the mug is hot, hand Justice Ginsburg a boxing robe. Our Ruth Bader Ginsburg Transforming Mug reminds you to stay strong - and, as U.S. Supreme Court Associate Justice Ginsburg said: "play your part in helping to achieve a more perfect union." 12 oz. / 350 mL Microwave safe, not dishwasher safe.