Click on Click on image for Zoom View. Here's a 14 oz. mug in our Earth & Sky color combination (cobalt blue and black over toasted orange). This is one of our better mugs with a thumb-rest atop for a better grip and balance and Tama's signed and dated inscription on the bottom. Like everything at Prairie Fire Pottery it is handmade, lead-free, microwaveable, and food & dishwasher-safe. All the pieces in this offering are from the same kiln firing and have been carefully matched in size, shape, color, and glaze pattern. However, small variations do naturally occur.