This tumbler is made of stainless steel. Bring along some of your favorite beverage for the daily work or school commute or gym workout with this tough stainless steel tumbler and lid. This 13 oz. tumbler has a sturdy construction with a size that fits in most conventional car cupholders. Plastic interior keeps drinks hot for hours and is easy to clean. BPA free and FDA approved. You can customize your own logo on it.