SCENT STEMS HOLDER Accessory. Fill your home with beautiful fragrance with our liquidless diffuser. This ceramic vessel is designed to be used with our Scent Stems that are individually infused with inviting fragrance. Our beautifully uncomplicated fragrances are made with love to live in harmony with your home, providing a scented backdrop for whatever your day brings. Designed to be used with CIRCA Scent Stems. Place your Scent Stems of choice into the ceramic vessel ensuring it's placed on a flat surface away from open windows or vents. Replace your Scent Stems every 30 days to refresh your fragrance or to increase their strength.