2022 UPDATE: The original models were a bit wonky and used centimeters instead of millimeters as the unit. Whoops! I've rescaled them so they should import properly by default into PrusaSlicer now.

UPDATE: Made the wide mouth version fit better, and made a regular mouth sized one too. Now they should fit perfectly under the band. 

I wanted a shaker lid for a mason jar, but all the other designs I could find were just overly complex. So i made a really simple one.