TAKING THE PREP: FIRST DOSE OF PLENVU STARTING BETWEEN 4-6PM Step 1: Pour contents of the Dose 1 pouch into the mixing container. Step 2: Add cool drinking water up to the 16 ounce line on the container and mix. You may add Crystal Light if desired. Be sure to dilute the PLENVU liquid as shown at the left before drinking. This may take up to 2 ....