I love essential oils and this diffuser allows me to enjoy all of my favorite scents for hours without worry about flames or heat. The colors cycle every few seconds, but can be stopped on your favorite. I use distilled water in mine to prevent mineral build up, but tap water can be used as well. I add about 10 drops of oil and let it run until it shuts off. This is a great help during cold season, as eucalyptus oil will keep you breathing clear and the added moisture is beneficial. It is also great for holiday scents! #RankBoosterReview #Sponsored #Cosscci