Device and method for mixing and washing liquids and/or solids and for washing containers

A holder containing a mixing vessel is rotatable about its longitudinal axis by a drive configured to rotate the holder alternately in a clockwise and anti-clockwise direction. A programmable control unit is configured to regulate an angular excursion (alpha) of the holder in the clockwise and anti-clockwise direction. The control unit includes instructions for a mixing sequence to be carried out in which the holder carries out first angular excursions of a first angle in a first cycle and second angular excursions of a second angle in a second cycle. The process includes placing liquids and/or solids into the mixing vessel, and then inserting the mixing vessel into the holder. The holder is subsequently alternately rotated by the drive through the first angular excursions and then the second angular excursions.