Kamlife Stainless Steel Vacuum Insulated Thermos Cup Travel Mug (17Oz, green) High quality Stainless Steel construction with smooth glossy finish ECO FRIENDLY. This reusable water bottle replaces many single use plastic water bottles. Much safer for you and the environment Can use when the cup lid, office travel more convenient Keep liquids HOT or COLD up to 12 hours. Leak proof design lid with easy twist and pour operation for quick liquids access Vacuum Insulation Technology where air is sucked out, creating a vacuum between the wall to minimized the effect of outside temperature