To be honest min is just a home made thing. I have a fish tank air pump (Milton air 200) some tubing for air line, a small valve that is screwed into a pvc pipe cut about 3” tall and my cups are pvc that fit into the 3”. The bottom of the cups have an air stone type material that air can pass through. They are simple to make and cheap if you make it. I haven’t looked online but I bet there are all types of do it yourself videos. You can also find them online at auction type sites. They work well for all your jig head or anything you can dip in the cup powder painting.