I saw this bottle stopper in this closed thread, anyone know if it is available and if so where I can purchase them?
http://www.penturners.org/forum/f18/couple-new-stoppers-21829/
I'm not clear exactly what you are asking about.
The thread that you cite mentions some kind of innovated new stopper
insert, but does not provide a link to either purchase those stoppers, nor does it provide any information about what makes them unique.
On the other hand, the images depict the inverted, or space-saving
design of stopper that you can make using readily available inserts such as the excellent Ruth Niles stainless steel stopper or the inexpensive silicone sleeve/dowel type of stopper.
Capt Eddie did a video on space-saving stoppers just before Christmas. The basic idea is to recess the stopper insert (either metal or silicone) inside the turning. That does two things - first, it reduces the overall height of a stoppered bottle so that it fits better into a refrigerator. I can see value in that. Second, it makes the stopper appear to be more like a bottle cap and less like something that is resting on top of the bottle. That's an interesting graphic feature in the design of the finished stopper, but its not necessarily better.
The key things to remember in making inverted stoppers are:
1. You must leave enough meat on the top of the finished stopper to completely contain and cover the stud that mounts the stopper to the turning. With metal stoppers, you must measure the length of the stud, and then add a little, to determine that thickness. In my experience, that means that the top must be at least 3/4" thick. With the silicone sleeve/dowel design, you have the option to cut the dowel shorter if you want to make the top thinner. I've made stoppers with the dowel as short as 1/4" (I glue the dowel into the turning, so I don't need a lot of length for mechanical strength).
2. The diameter of the recess must be large enough to fit completely over the top of the bottle. I normally make it 1-3/8".
3. Capt Eddie suggested making the recess deep enough that the insert is completely contained within the turning. I agree that really looks best, but a shallower recess will still function as a stopper.
