Emergency Replacement Bottle Cap

I had a bottle cap self destruct on me, so I quickly designed and printed a replacement bottle cap.
This design requires spiral_extrude().
This is designed to seal against the tip of an eyedropper type bottle (though it would be a bad idea to put what is in this bottle in your eye). Not sure it is actually sealing there, may be sealing on the shoulder of the bottle.
This is another OpenSCAD design.