Please see video, at the end of the description, for full instructions.  Instead of using Fusion, you can customize it right on Makerworld, and insert your measurements here. Most caps print well at a 0.2 layer height, but decreasing height to 0.16 or 0.12 will give better results. 

You will need to measure 4 things on your container/bottle/jar…

1. Major Diameter (Outside diameter of bottle/jar neck including the threads)
2. Minor Diameter (Outside diameter of bottle/jar neck not including the threads)
3. Pitch (Distance between threads at 1 rotation)
4. Lid Height (distance between top of bottle neck and “transfer ring”) 

This picture below shows these measurements you need to take.  Use calipers if possible.  The more accurate the measurements, the better the lid will fit!  If the lid doesn't fit right away, make adjustments to your measurements (including clearance if necessary) and print again.

Here is a video showing how to use the different parameters.  The video shows how to use the parameters in Fusion, but you can just use the Makerworld customizer instead - they're the same.