I had printed a pencil case for my bag awhile back, but kids being kids, they managed to break it. Given that I wasn't entirely happy with the one I found in the first place, plus the poor print quality of the first one, I decided to take the time to make my own.
I wanted a simple sliding top and deep enough for a number of pencils. It was a bit more challenging than I anticipated, but I am happy with how it turned out.
The author hasn't provided the model origin yet.