The sour optic glass is an evolution of our original sour glass, including an optic design and slightly thicker proportions for increased durability. This glass is equipped with an outward flared lip essential for the traditional sour and delivers silky smoothness to the entire palate for the balance of flavor. Presenting the Riedelbar drink-specific glassware collection, an innovative series in collaboration with spirits specialist Zane Harris. This collection answers the need for cocktail-specific glassware with glasses like neat, rocks, double rocks, fizz, highball, nick and nora, sour, and coffee, all perfected to cater to thousands of cocktails. This product is machine-made. This item is dishwasher safe. This pack contains 2 pieces.