The Saratoga Cork Bottom Stainless Tumbler: Your Daily Companion. A durable tumbler engineered for performance. Laser engraved, designed to fit most cup holders, and crafted with refreshed materials. Perfect for commuters and adventure seekers who demand a reliable drinkware piece. 18 oz Stainless Steel Drinkware with double wall insulation. Keeps beverages cold for 12 hours, hot for 6 hours. Cork bottom protects surfaces from heat and scratches.