The CamelBak® Tumbler 20oz is 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.