I don't get down to Pueblo, Co. often, but try to walk the lines when I do. I usually find common stuff & sometimes one with a litlle amber or junk. It more about getting outdoors & seeing a lot of glas still in the air. Anyway, today I happened upon this one resting @ the end of a cross arm loaded with common glass. I usually leave Mud alone, but this one had an inteesting shape I havn't seen before. When I got it down I realized it is a 2 piece insulator with a twist off cap. Any information one of you may have regarding this piece would be greatly appreciated. The embossing is (F) PAT PENDG, (R) AF Co INC./Chicago, ILL. . I also posted a few pics of the glass I found on Hunts & Finds. Thanks, for any help, Dan Gauron