A dispensing container and adapter system for use with a planetary mixer is disclosed. The dispensing container has a longitudinal axis and a transverse axis. The dispensing container may include a nozzle and a removable cap to cover the nozzle. The removable cap may have a first width dimension measured along the transverse axis. The dispensing container may include a body having a second width dimension measured along the transverse axis. An adapter may receive the dispensing container. The adapter may include a cavity to receive the removable cap. The cavity may have a cavity width that exceeds the first width dimension. The adapter may also include a recess for receiving a portion of the dispensing container. The recess may extend from the cavity. At least a portion of the recess may have a width dimension smaller than both the first width dimension and the second width dimension.