A snug-fit spanner / tool for removing and installing the bung on common water containers. Tested with a few 10L and 20L water containers available in Australia, but will very likely suit other containers too.

I created this because I would always end up damaging the bungs by trying to use other tools that didn't quite fit right. I've used this for a couple of years now without any problems, and no damage to the bung.

My recommendation is to print with at least 3 walls and 25% infill to ensure it is strong enough. It's only a small part / model so experiment with the settings as much as you like.