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.Specifications and Features: 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