Double Wall: JavaFly provides an extra layer of insulation for your drink to stay hot or cold longer. Clear Headed: The translucent walls of our mugs and glasses will bring clarity to your life and open your eyes to a life of visionary proportions. Perfect Vessels: Pour your cosmic coffees, capricious cappuccinos, levitating lattes, maximizing macchiato, teasing teas, hypnotizing hot cocoas, expressive espressos and every other hot or cold drinks into these elegant cups. Material Witness: Made of heat resistant borosilicate glass. Glassy Contents: It includes 4 mugs of 15.5 oz. Classic Elegant: The cup looks beautiful on the shelf while proffering a magnificent drink in the glass. Senses Activated: Engaged your senses while enjoying a good drink in a JavaFly cup. Easy Clean: Simply wash by hand or in the dishwasher. Long-Lasting: Theses beautiful cups will have a long life if properly cared for.