Bormioli Rocco Cobalt Blue Swirl Drinking Glasses Set of 4 Tumblers is a stackable, dishwasher safe glassware set made in Italy. The set includes four 9oz tumblers with a fun abstract blue swirl pattern on round-shaped glasses. These glasses are perfect for all occasions and are decorated with a capacity of 4.5 inches. The set is designed for unisex adults and is ideal for entertaining guests.