a one piece integrally formed sectional shaped liner for use in combination with similarly shaped sectional liners in a generally cylindrical chamber of a centrifuge rotor . the utilization of a plurality of similarly shaped plastic liners within a single rotor chamber allows for the placement of different fluid samples in a single rotor during one centrifuge run . the liners are designed in such a manner that they do not require a separate capping means and are preferably made through a blow molding process . the liners are designed to provide adjacent support to each other during the centrifugation run .