I call this a mug but it really is a tumbler. There is no handle. But Tiki mugs are generally called mugs even though they don't have handles.
Now that that is settled, the inside is glazed with a beautiful ,deep, cobalt blue. There is some of that same cobalt blue and also a red underneath a deep amber glaze. The surface is hand decorated and painted.
It is food,dishwasher and microwave safe.
The mug is just under 5 inches tall and holds about 11 ounces of your favorite beverage.