Never spill another drop! 100% spill- and leak-proof travel mug uses exclusive AUTOSEAL® technology to prevent accidental spills. Press the AUTOSEAL® button to sip, and release the button to automatically seal. This self-sealing lid technology is combined with a double-wall, vacuum-insulated, stainless steel mug, providing exceptional temperature retention. Beverages stay hot for 4 hours or cold for 12 hours. Volume: 16 oz. Dimensions: 3.5” wide at the widest point of the lid x 7.8”H x 3.3” at widest point of mug x 2.5” diameter at base.