Glass cover in OpenSCAD

I often play Petanque (boule) in my local pub's garden. I devised these simple covers to keep wasps and other bugs out of my beer (or water, as in one picture).

There are 2 versions: a plain one that works well for small diameters, and one with a knurled knob for larger ones. Files with names that include 'handle' are the ones with the knob, those without are... without.

The handle is glued into the lid (superglue or solvent).

If you want to modify the design in OpenSCAD then you will need to download the following 2 libraries:

knurledFinishLib.scad - you will have to remove the "_v2" bit from the file name (or add it to the OpenSCAD file).
chamfer.scad