I tend to listen to music/podcasts on my phone whilst mowing my lawn, the earphone cord is too long though and liable to getting caught on things!
I liked the design of http://www.thingiverse.com/thing:268764 but wanted something that was easier to print without supports (note that Raplicator appears to now have a version that is better for printing flat). Plus I wanted an exercise to practice using 123D Design on as at the time I was new to the program, this seemed the perfect solution and a nice quick model to test the print on.
I decided to keep a as close to the overall shape as possible and to also keep the idea of the contour channel for the cord to sit in, but flatten the overall design. I created the model from scratch so the profile does differ slightly from the shape of Raplicator's original.
Standard Robox "Normal" profile