Perfect for long journeys and amazing destinations. A durable full powder coat finish keeps drinks tasting great, while the copper vacuum insulated stainless steel vessel stays hot or cold for hours on end. The tumbler lid features tri-mode flow control, and the tapered design allows for a comfortable grip and a perfect fit for most cup holders. A non-slip silicone pad on the base of each vessel grips surfaces to avoid scratches and spills. 10 Hours Cold, 5 Hours Hot. Hand was only. 16oz. 18/8 Grade Stainless Steel inner wall with Stainless Steel Outer.