How Does An Insulated Thermos Work
Preparation Whether you reach for your thermos to get a refreshing sip of cool water or extra warmth in the form of hot cocoa after a wintery hike outdoors, there’s no denying we rely on our drinkware to keep beverages at the right temperature. Still, do you ever wonder how your insulated mug, thermos, or metal water bottle keeps your beverage either perfectly chilled or steaming hot? To better understand the science behind insulated thermoses, we asked YETI’s senior engineering manager Bill Drinkwater to explain it all....