Separatory funnel valve

[Edit: Uploaded the wrong body and valve. (They worked, but the 8mm hole was a little too big. Not enough sealing surface. So I reduced the hole to 6mm.)
The correct files are Body good.stl and Valve good.stl.
The hundreds of instant "downloads" are no doubt fake, but there was time for someone to grab the old files. If so I apologize.]


This valve can be mounted onto any bottle cap, assuming you can poke near a 5/8 inch (16mm) hole through said cap. 5-minute epoxy fastens it. Then the bottle becomes a sep funnel.
I used a 20oz water bottle. Nice tight, waterproof cap design. Easy to drill the hole.
Water bottle is very thin plastic, but it's transparent and disposable.
I had a piece of 5/8 conduit, and made a bottle-holder that slips over it. The bottle is plenty stable when the tubing is mounted vertically in a vise. Or use your lab stand.

Orient the prints so there is no support in the hole surface where the valve turns. The design is zero-clearance. I printed a f