Keep your coffee warm and your fingers cool with this set of two insulated coffee glasses from JoyJolt. These double-wall glasses can go safely in the oven to warm up drinks and in the freezer to cool them down, and they maintain your drink's temperature while you're holding them. Our Caleo double wall glass coffee mugs come in a set with a 13.5-ounce capacity. These double wall teacups hold the perfect size drink. Its elegant shape fits comfortably in your hand and remains cool to the touch. It maintains the perfect sipping temperature and prevents condensation from forming.