An innovative (and incredibly potent) liquidless diffuser. This set features two scents, one evoking the mediterranean sea and the other, japan in spring. The Scent Scene™ Duo includes two individually packaged Scent Stems™ fragrances: Kyoto in Bloom Camellia & Lotus and Lost in Amalfi Sea Mist. To use place your Scent Stems™ of choice into the metal vessel, ensuring it's placed on a flat surface away from open windows or vents. After 30 days, or a time of your choosing, swap out the Scent Stems™ for the other supplied fragrance. Replacement Scent Stems™ are sold separately, with seven fragrances to choose from. We suggest replacing your Scent Stems™ every 30 days to refresh your fragrance or to increase their strength. After 30 days the Scent Stems™ can be placed in recycling with other paper products.