Set of 6 Open Up glasses The fineness of the drinker offers exceptional comfort and allows the aromas to concentrate, while the spicy bottom highlights the bubbles. Open Up glasses promote the opening of aromas and the pleasure is instant. These glasses are made of Krysta, a quality material that guarantees brilliance and resistance. Chef & Sommelier is a French brand of the Arc International glass group. Recognized for its know-how, the brand partners with experts to create collections of glasses and accessories dedicated to enology.