Watermelon Car Air Freshener Diffuser Bring out your inner child with the ripe sweetness of our Watermelon fragrance oil, and recall the first bite of juicy, dripping melon after a long summer day spent playing outside. A top note of honeydew melon adds a bright fruity punch to this classic scent, while a strong middle note of watermelon adds to its authenticity. A base note of sugar emphasizes the sweetness to round out this realistic fragrance. Top: Honeydew Melon Middle: Watermelon Base: Sugar