The invention pertains to a cassette (1) provided as a cover of an accommodation section of a container (3) which can be filled with a liquid separable into individual components by means of a centrifuge having : a plurality of containers (3 5 7) where a central container (3) is fixedly arranged at the cassette (1) and said central container (3) is connected to at least one outer container (5 7) through interruptible connection means (15 17 11) and a data storage device (19) arranged on the cassette (1) or on the central container (3). Furthermore the invention pertains to a workstation for marking containers (5 7) containing a liquid and a corresponding method.
