16 oz. (473 mL) double wall vacuum insulated Stainless Steel body with soft sit Silicone base. Lockable and leak-proof pop-open press button cap with stowable finger loop. Patent-pending self-draining cap during wash. Designed for use with cold beverages; cold up to 18 hours. Top rack dishwasher safe. Please do not microwave; please do not place in freezer.