The Rock, made by Thermos, is a vacuum-insulated container designed to keep your beverages either hot or cold. It features a dual-layer of 18/8 stainless steel separated by a vacuum layer, increasing its insulative properties. The Rock has a "twist-and-pour" stopper allowing you to pour without removing the stopper completely. It has a 1.1 qt. / 1 Liter capacity and features a large, rubber-coated ergonomic handle.