Thermos Vacuum Insulated Stainless Steel Beverage Bottle 34-ounce Thermos vacuum insulation technology locks in temperature to preserve flavor and freshness to keep beverages hot or cold for 24 hours Durable 18/8 stainless steel interior and exterior withstand the demands of everyday use Convenient twist and pour stopper makes serving simple; Built-in cup lets you serve beverages anywhere Quality made by Thermos