Yes. Listerine Cool Mint Mild Taste Mouthwash can generally be used directly without diluting it with water, unless the product label specifically instructs otherwise. Measure the recommended amount (usually 20ml or 4 teaspoons), pour the mouthwash into a cup, swish it thoroughly around your mouth for about 30 seconds, and then spit it out. Do not swallow it. Avoid rinsing your mouth with water immediately after use to allow the mouthwash to work effectively.