Lifeventure TiV Vacuum Flasks will keep your drinks hot for eight hours, or cool for 24.__ The lid is stainless steel, and can also be used as a cup.TiV: Thermally induced vacuum for optimum performance Keep drinks hot for up to 8 hours or cool for 24 hours Stainless steel construction with copper coated inner wall Sleek design with stainless steel lid that can be used as a cup Conforms to British Standards for quality and safety Weight: 356g