This winter he bought a few thread molds that eliminate the need for gluing on a threaded plastic ring. They were a little rough when he bought them and he had to do some clean up of the plaster. Now that he has worked with them a few times he thinks he will be able to make his own.
The soap pump in the photo below has the glued down ring and foaming soap pump. If the molds work well Jeff will switch over to those exclusively. In the mean time, I have been having fun adding the ginkgo leaves to his bottles.
clicking on the photo will take you to Jeff's Etsy shop