A mixing unit (100) for mixing of fluids is disclosed. The mixing unit (100) includes a mixing chamber (102) for holding one or more fluids and a driving assembly (104) operatively engaged to the mixing chamber (102). The driving assembly (104) is configured to oscillate the mixing chamber (102) for mixing the one or more fluids. The mixing chamber (102) of the mixing unit (100) enables better mixing of fluids in a convenient manner. Further less amount of cleaning fluids may be only required for cleaning the mixing chamber (102) after the mixing process. The mixing unit (100) can be used for mixing amino acids with different fluids however this unit can be used for mixing other fluids as well.