Regular Mason Jar Lid Cover for 2 inch net pots (kratky)

Simple, friction-fit lid for regular mouth mason jar lids. This will secure a 2" net pot to a regular mouth mason jar lid, and allow you to unscrew the whole contraption together for refills. 

I printed these with a 0.8mm nozzle for one layer thick walls on the round part, to keep it flexible. 

There's a 1" hole version if you want it to double as light blocking too (obviously print it in something opaque)