The 20 oz Stanley® Stainless Steel Insulated Flip Straw Tumbler offers bold, colorful style and practicality. Perfect for car commutes or home workouts, it features a built-in flip straw for effortless sipping. Snap it shut, and the double-wall vacuum insulation keeps your drink extra cold for hours. The IceFlow Tumbler promotes a sustainable lifestyle, made in part from recycled plastics sourced from discarded fishing nets, preventing nearly 100 pounds of waste from entering our waters per every 1,000 IceFlow manufactured.