The Moscow Mule Mug with Pewter Medallion is made of stainless steel with a copper plated coating. You can choose from 1 of our 5 medallion options to go on the mug. It holds 16 ounces of your favorite drink. 16 oz. Personalize the medallion with 2 lines up to 15 characters each line. For engraving, type and words in the order notes box at checkout. 2 lines up to 15 characters per line.