This 20oz. RTIC Tumblers is stainless steel, double wall vacuum insulated. Keeps your drinks ice cold longer, works great for hot beverages, and reminds you every time you take a sip to “don’t let the world teach you theology.” The included 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.