The RamblerA(R) 14 oz. Stackable Mug features the DuraSip(TM) Ceramic Lining which is fused to 18/8 stainless steel, making it tough enough to take a tumble. As with all RamblerA(R) Drinkware, it&';s over-engineered with double-wall vacuum insulation. Features DuraSip(TM) Ceramic Lining: A non-stick, no-mess interior that resists staining from highly acidic beverages like coffee. The lining is fused to 18/8 stainless steel, making it tough enough to take a tumble. Double-Wall Vacuum Insulation: Keeps cold drinks cold and hot drinks hot until the last sip. Rust and Puncture Resistant: Made with kitchen-grade 18/8 stainless steel. 360-Degree Welded Handle: Delivers a firm grip on your favourite beverage-won&';t break if it hits the rocks. Dishwasher Safe: Because no one needs more work to do. Specifications Empty weight - 1.00 lbs. Dimensions - 5.1" W x 4.5" H (13.0 W x 11.4 H cm).