Yukon Outfitter's Freedom Tumblers have become a crowd favorite, known for their high performance and durability. Made of high grade 18/8 stainless steel and double wall vacuum insulated, they will keep your favorite beverage hot or cold for hours. Available in 20oz, 30oz, and 40oz, choose the size to fit your adventure. Double Wall Vacuum Insulated - provides maximum temperature retention of both hot and cold beverages. Up to 6 hours hot and 24 hours cold. High-Grade 18/8 (304) Stainless Steel - highly durable and corrosion-resistant. Copper Plate Insulation UV Tint Slider Lid DuraGrip Powder Coat Finish - our proprietary finish is both ultra-durable and provides a textured surface for you to grip. (excluding stainless steel variant) Sweat Free Exterior BPA Free Designed to fit most cup holders