Bottle Gravity / Waterfall Bong Cap for 14mm & 18mm Bowls

Wanted a more reliable way to attach a bowl to a gravity/waterfall bong.

I included both 14mm & 18mm bowl throat caps.

I also have two different styles, the normal one, and the mini/compact one. They are both super quick prints.

Please let me know if you need any other sizes or styles. Post your makes!