THIS INVENTION RELATES TO A DUAL PHASE MOUTHWASH COMPRISING A HYDROPHILIC PHASE, A HYDROPHOBIC PHASE, AND A HYDROTROPE, WHEREIN THE HYDROPHILIC PHASE COMPRISES AN EFFECTIVE AMOUNT OF A PRESERVATIVE SELECTED FROM METHYLISOTHIAZOLINONE, SODIUM BENZOATE, POTASSIUM SORBATE, AND COMBINATIONS THEREOF, AS WELL AS TO METHODS OF USING AND OF MAKING SUCH COMPOSITIONS.