We at Fungi Perfecti are all in favor of Klean Kanteen's mission to promote sanitary, environmentally responsible drinking vessels. We're also really in favor of coffee and tea....our office wouldn't function without them! This is possibly the best container for your hot beverage we've ever encountered. Its all-stainless-steel construction and double-walled vacuum insulation keeps drinks warm for hours. Comes with a leak-proof travel cap.