Our Hidden Message Mugs feature natural stoneware at the base with the rest of the mug holding a white milky glaze. This is a great gift for those who get after it and don't stop until they get the job done. You'll find a hidden message at the bottom of the mug, reading: "Pray, Hustle, Repeat" Holds 24 oz. 100% Stoneware Microwave and Dishwasher Safe Special hidden message at bottom interior: "Pray Hustle Repeat"