Z-Stem Margarita Glasses will thrill everyone who gets to drink out of them. They are a fun stem that swerves out to the side. It is a fun novelty glass for Margarita and other contemporary drinks . While the Margarita conjures up a certain panache and sophistication, there's no reason sipping one should be a serious affair. Libbey adds a touch of fun to the cocktail hour with this set of four Swerve Margarita glasses. The stem on each not only curves stylishly but attaches unexpectedly to the side, not the bottom, of the flared bowl.