With unbreakable stainless-steel interior and exterior construction, the Thermos® The Rock 1-Liter Beverage Bottle also features vacuum insulation technology that provides exceptional temperature retention and keeps liquids hot or cold for 24 hours. Pour liquids into the stainless-steel cup by releasing the twist-and-pour stopper on the bottle. The bottle remains cool to the touch when filled with hot liquids, and the sweatproof design eliminates water rings and residue. The bottle carries easily with an extra-large ergonomic handle with a soft, nonslip grip.