American Flag Printed Reusable Cup 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 Flow Lid w/ Three Position Slider - Close, Sip, Chug DuraGrip Rubberized Finish - our proprietary finish is both ultra durable and provides a textured surface for a better grip. Designed to fit most cup holders