Yukon Outfitter's NEWEST Tumbler has quickly become a crowd favorite, known for its 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. 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 Three Position Slider: Cover, Sip, Chug Reusable Straw Ergonomic Handle DuraGrip Powder Coat Finish - our proprietary finish is both ultra-durable and provides a textured surface for you to grip. Sweat Free Exterior Environmental Friendly Recycled Content BPA Free Designed to fit most cup holders Non slip base