This swivel top commuter cup retained heat better than all other swivel-top models evaluated by the Hammacher Schlemmer Institute, earning it “The Best” rating. When filled with boiling water by Institute analysts, it lost only 14° F in heat after two hours, while the contents of lesser cups chilled by 33° F in that time. A panel of consumers also awarded it top marks for retaining temperature, thanks to two layers of stainless steel and vacuum insulation. The Best Swivel Top Commuter Cup’s locking lid did not spill, even when tossed or shaken upside down, and no liquid sloshed out during travel. It fits in most standard car cup holders, has a handle for easy grip, its rubberized base will not leave water rings, and its convenient design allows drinking from any side of the opening without obscuring your view when you take a drink. 16-oz. capacity. 8" H x 4 3/4" W x 3 1/2" D. (1 lb.)