Polymer, that fancy word for plastic. Plastic goes to 10 but these go to 11! Being made of polymer and not glass they travel well. And, they take a licking. We dropped one off the ledge of the Mayo Penthouse bar and ne'er the worse for wear. (Just kidding. We tossed it out of a car window, sitting still at a red light. Still.) This jar subs seamlessly for the glass one that shipped with your Comandante, and they come in colors. Like stained glass, only polymer.
