A High-Quality And Lightweight Thermos Flask. The High-Quality Vacuum Insulation Technology By Thermax Ensures Maximum Preservation Of Cold Or Hot Temperatures And Maintains The Contents On Temperature Up To 3 Times Longer Than Comparable Thermos Flasks! Special Lightweight Stainless Steel, Copper Plated For Optimum Insulation And Also 20% Lighter. The Special Construction Renders It Virtually Unbreakable And Dent Resistant! So The Insulation Hardly Diminishes, Even After Intensive Use. In Other Vacuum Flasks, A Dent Causes An Immediate Reduction Of The Insulation. With A Cap That Doubles As A Drinking Cup With A Practical Push-Button Underneath. Comes With A 5 Year Guarantee