I wanted a simple cylindrical container with a lid to base future projects off of. This one printed well at a 10mm radius and the lid fit with no effort at .3mm tolerance; your printer may vary! If customizer doesn't make the lid slot correctly download it and compile...

Updated with more useful module that has all parameters as input and not globals.

Print the lid and the container (compiles together, download the scad source file to compile just one or the other). The lid slides into the container the same orientation as printed.