Despicable Jelly Lid

This is a lid that fits a standard small-mouth mason jar with extra headroom to allow you to store the spreader in the jar.
[update]The original model was too loose so I have updated with one that is 1mm narrower diameter.[/update]

If you want one the fits Crofters Jelly jars, you can find it here: https://www.thingiverse.com/thing:3116870.