Shaving Brush Travel Tube

I have previously played with similar designs on a travel brush tube for carrying a shave brush. I was able to create one by remixing a few other projects into something that worked for my particular brush. I wanted to build a design from the ground up using openscad so it was parametric and could be easily recreated for different height and width options. The result is what is attached.

To change the dimensions you can set 8 options:
diameter - the inside diameter of the brush tube
height