This carafe is made with a thermal stainless steel interior that radiates escaping heat back into beverages. The double-wall vacuum insulation is excellent for keeping drinks hot for 2-4 hours at a time, and its durable exterior is able to withstand heavy-duty use at restaurants, hotels, and banquet halls. Its 50 oz. capacity allows you to serve up to (12) 4 oz. cups of coffee at time.