Click on image for Zoom View. Here we have a 12 ounce, wheel-thrown mug in our Earth & Sky color combination (a beautiful blend of cobalt blues and black above toasted orange). Like everything at Prairie Fire Pottery, it is handmde, lead-free, microwavable, and food and dishwasher-safe. All the pieces in this offering are from the same kiln firing and have been closely matched in size, color, and glaze pattern. However, small variations do naturally occur.