Reed sticks included. Flip reed sticks weekly, or just before guests arrive, to refresh scent throughout your room. The small diffuser will last one month and is perfect for adding a little refreshing scent to small areas like closets, powder rooms or even your desk. The 250 ml diffuser will last up to three months and is ideal for larger areas of the home or office. Consistently spreads wonderful scent throughout a room (minus the worry of an unattended lit candle).