This 20 oz. stainless steel travel mug features a polypropylene lining and cork base, allowing it to keep beverages hot or cold for up to 3 hours. For drinking ease, a push-on lid includes a sliding drink opening. Make it fully unique with exclusive art of your choice and personalization! View over 100 exclusive art options by clicking through the product images or downloading our easy-view Exclusive Art Guide in the link under details & specifications. *Please note that some color variations my exist in the color of the cork due to natural characteristics.