The invention relates to a device (1) for metering media (2) and comprises at least one storage vessel (3), a measuring vessel (14) and a target vessel (14) that are interconnected to give one unit. By the exertion of force on the media (2) to be metered they can communicate between the storage vessel (3) and the measuring vessel (4) and can then be transferred to the target vessel (14). The metering volume is determined by the geometry of the measuring vessel (4). The target vessel (14) can be separated from the measuring vessel (4) by severing (welding, gluing, cutting) the connection between (14) and (4). The invention also relates to a method for metering media using the device (1) according to the invention. The device is suitable as a disposable unit and for the sterile metering of media in a non-sterile environment.