I am thinking right now how to make it. And I finally did 2/23/13. I used a baby blue fabric with a white thread zig-zag down the middle, it's feminine and pretty.
A fix for those jeans with the pesky zipper that won't stay up. Also would work for early prego jean wearing when you aren't ready for maternity but you can't button your jeans. I used the rubber and trick but the zipper would eventually slide down. No more!!