Remix of the many gravity water bong designs. Used actual mason jar lids instead of printing. Printed ones threads wore too fast. Very little leakage. Stable. used self piercing gutter screws because that's what I had around. Any similar size screws will do.

Designed around 16oz / 500ml wide mouth jars.

V2 for the small mason jars is here - https://www.thingiverse.com/thing:7290282

XYZprinting

da Vinci 1.0 Pro 3in1

No

No

.2

30-50

Print 2 lids.
Supports are already in file.

Bit of sanding, gluing and acetone wipe.
Glue the lids to the middle section with the metal mason jar lid pieces in between so they rotate freely. There's enough leeway so they freely rotate. Just be careful to align the holes up and not to glue the lids in place.