12oz. RTIC Lowballs are stainless steel, double wall vacuum insulated. Keeps your drinks ice cold longer - works great for hot beverages. The RTIC Lowball is perfect for a cup of coffee, whiskey, scotch or your favorite cocktail. The included all-new shaded Splash Proof lid lets you know exactly how much drink you have. The flip-top closure resists spills and is straw friendly. Easy to clean.