Your best snooze, starts with your schnoz. Create the perfect sleep environment with the Marpac Purest scent machine. Fill the bedroom with scents that signal to the nose-to-brain super highway that it's time to sleep. It becomes the start of a healthy bedtime routine. The Purest has a unique hinged lid that makes adding water and scents easy and mess-free. And there's space to store two scents built right inside the cover. Choose one of two scent intensity levels and 1-hour, 2-hour or continuous use timer options. The unit is controlled with quiet capacitive touch controls. Use Marpac's unique scents, designed specifically for sleep, or use any essential oil scent. Marpac sleep scents include "That's Good Sheets", "Chill Pill(ow)" and "Up to Nose Good" and are sold separately.