Isopropyl Alcohol Wash Bottle Cover

I was surprised when the vast majority of “wash bottles” available on Amazon didn't come with a cap.  Since I was going to be storing Isopropyl Alcohol in mine and sitting it next to my printer to wash off filament plates, I wanted to try and prevent as much evaporation as possible.  Thus the cover.  I printed this in .16mm layer heights for quality on the threads to hold the lip on the bottles they all have.  My example unit: 

https://www.amazon.com/gp/product/B00WTHLR18