Wine bottle screw top

This top will fit most current screw-top wine bottles. It is designed to have an O-ring inserted to provide a good seal. I used O-rings with 3/4" inside diameter 1/8" thick and 1" outside diameter. The thickness and outside diameter are not too critical, but the 3/4" (19.05mm) inside diameter makes a nice fit on the centre of the thing.
Note: I have replaced the original file with an updated version which is a better fit; the centre spigot of the original was too big for some bottles. There are