The Hydro Flask 12oz Coffee with Flex Sip Lid packs loads of insulation power into a small package. At a height of just over six inches, this bottle conveniently fits under most instant coffee makers. TempShield technology uses double-wall vacuum insulation to keep your coffee or other hot beverages warm however you plan to spend your day. The Flex Slip lid allows you to sip hot drinks without worrying about leaks.