JoyJolt’s Double walled glass mugs are not unique to our collection, but we wanted to provide our customers with a subtly exciting twist to or classic design. Our Caleo Collection features a wide assortment of double walled mugs for hot and cold beverages, made with the best hand made mouth blown glass now with a new modern twist. The design has an elegant, angled curve to its base. It’s sleek. It’s unique. It’s Caleo. No what kind of day you’ve had a cup of tea can always wine down your day in the most calm and serene manner. That’s why we created the perfect mug to our Caleo collection specifically for tea. Following Caleo’s Telltale design, the tea mug in this series has a double wall application to maintain your drinks hot temperatures The 4 mug set are made of pristine hand blown glass which can withstand temperatures of up to 350 degrees Fahrenheit. This heat can be from the microwave, the liquid itself, a dishwasher, or even an oven. Additionally, the Caleo mugs are also freezer safe, allowing hot coffee to be turned iced without having to change cups. By only using top quality borosilicate-glass for our mugs, we give our customers durability, functionality and style all in one