Mighty Mug won"t tip over if you accidently bump into it. It"s the smartest coffee mug you"ll ever own--it knows when to grip and when to lift. Suction-style bottom won"t release its grip unless you lift straight up. Won"t ever leave watermarks either! Double wall keeps your beverage hot or cold longer. Microwave safe. Lid and inner well are top rack dishwasher safe. BPA-free. Holds 16 oz. Choose Black or Red.