Our wise old owl coffee mug comes in 11 oz and 15 oz. The design is based on the black owl mug, but has been modified for a white surface. Instead of simply inverting the line drawing I decided to create a solid shape design, while retaining most of the original line art for the facial details. The main difference is i rounded the design into an oval rather than having the lines fade to the sides. I chose green over black because the I found the black was rather jarring to look, while green was much gentler. Microwave and dishwasher safe.