Award-winning Retro 6oz insulated cups set of 2, by Northwest Glass, won Best New Product in the Innovation Category at the World Tea Expo 2009! The contemporary glass cup is perfect not only for tea and wine tasting but also for a great cup of espresso. The cup’s exclusive design features a ribbed inner layer of glass with a slight but stylish twist. The insulated glass keeps hot drinks hotter and cold drinks cooler. Made entirely of sturdy borosilicate glass, it is safe for both dishwasher and microwave. The set includes two 6-ounce glass cups.