{Mazzega Art & Design} Italian Murano Glass Tumbler :: Large :: Goto da AcquaThis glass is produced entirely in Italy on the Island of Murano according to the ancient tradition of glass processing, blown and handmade by master glassmakers. Made of crystal glass and colored glass grit. Completely dishwasher safe (on a delicate program), color and shine unalterable over time. Slight differences in size, colors and density of Murrine and grit are not to be considered defects but unique characteristics of a product made by hand.