The Hydro Flask 16oz Coffee with Flex Sip Lid features a small opening in the lid for sipping hot drinks with a leak-proof design that is fit for your active lifestyle. The flex strap allows you to quickly pick up your bottle when on the go. Vacuum insulation keeps your coffee hot much longer than your average travel mug. Pro-grade stainless steel is incredibly durable and is both BPA and Phthalate-free. This bottle is large enough to fit about two cups of coffee, so you can stay fueled all day long.