Oil Bottle Cap

I needed a version of this bottle cap with a hole in the top for a spout. I added that from FredericM's version, and then applied an inlaid Voronoi pattern to the outer face for decoration.

To get the spout to fit in there, you just have to pull it a bit to get past the first rung of the screw. The rubber slides past and provides a tight seal.

Oil_Bottle_Cap.stl is a version of FredericM's cap just with a hole in the top.
Oil_Bottle_Cap_Voronoi.stl has the Voronoi pattern applied to the outside, and the knubs removed.