12oz Tea Travel/Brewing Tumbler which can be used for loose leaf tea, tea bags and as an infuser. The tumbler has a double wall construction. The exterior wall is Tritan which is impact resistant and BPA free. The interior wall is borosilicate glass. Only the glass interior comes into contact with your beverage. One hour hot or cold. Includes our patented two way leaf compartment build into the lid. The tumbler is leak proof and has a lock button that keeps the lid from popping open. Includes a strap for easy carrying. Hand cleaning for this item is recommended.