A lab member for use in a laboratory liquid handling system including a pipetting module and a drive system, the pipetting module including first and second pipettors, the first and second pipettors including first and second pipettor shafts, respectively, a first pipetting tip extending from an end of the first pipettor shaft, and a second pipetting tip extending from an end of the second pipettor shaft, includes a lab object and first and second integral adapter structures. The first and second adapter structures are configured to engage the first and second pipettor shafts, respectively. The first adapter structure is configured to releasably secure the lab member to the first pipettor shaft.