BonJour Coffee Insulated Borosilicate Glass Latte Cups, 2-Piece Set, 12-Ounces Each The latte cups' distinctive hand-blown borosilicate glass design is both beautiful and durable These 12-ounce insulated latte cups are crafted with two layers of glass to help keep beverages hot Innovative double-wall design provides an elegant visual effect; the insulated glass construction also helps prevent heat and condensation rings The eye-catching glass latte mug set makes a thoughtful gift for beverage connoisseurs Quality assurance guarantee