Luigi Bormioli Crescendo 20-Ounce Tumblers, Set of 4 Serve Mojitos or fresh juice with a tall tumbler from this 4-piece Luigi Bormioli set; 20-1/4-ounce tumbler glasses comes from the Crescendo stemware collection Luigi Bormioli&#8217;s proprietary material called SON.hyx allows the glasses to be extremely break resistant and transparent. 25 Year Guarantee! The guarantee covers chipping on the rim or foot as well as any discoloration or cloudiness resulting from dishwashing. Innovative glassmaking techniques produce perfectly smooth rims and edges Made in Italy, each glass measures 7 by 7 by 8-1/2 inches; the set weighs 1 pound upon shipping