CLEAN & SANITIZE.First, wash your hands well before preparing bottles or feeding your baby. Next, clean and sanitize the workspace where you will be preparing your formula. ADD WATER TO BOTTLE.Measure and pour the appropriate amount of water into a cleaOnce mixed, feed immediately or refrigerate in a securely closed container. Do not freeze mixed formulathis can cause the protein and fat to separate. Once prepared, formula should be used within 24 hours.