The Mountains Are Calling And I Must Go Coffee Mug 11oz Dishwasher and microwave safe! Our Indigo Blue Mountain Design and Quote are printed on BOTH the front and back of the mug. We use premium ceramic mugs and the highest quality inks to ensure a high quality product and design that won’t fade. We also have this design available Prime on a 15oz mug with Icy Teal Blue Mountains and Banner. Please visit our store here on Amazon Handmade to see all of our other designs.