Sets of two are packed 18 two sets per full carton (36 total glasses). For orders less than a full carton, sets may arrive individually, instead of everything in one carton. Tracking information will be sent for each individual shipment. SCIENCE THEMED SAND ETCHED COFFEE MUG: Each glass features a detailed look at the molecules found in coffee, with a short explanation about how each molecule contributes to your favorite caffeinated beverage. Perfect for science and chemistry lovers. Glass sets are carefully packed in an elegant gift box and chosen to make a lasting impression! 16 OZ: Premium quality glassware, 100% LEAD FREE, and just the right size. This glass is suitable for your favorite caffeinated beverage. Looks especially classy with a cappuccino, java, or espresso. DISHWASHER SAFE & GUARANTEED FOR LIFE