Set your Scent Scene™ alive with Scent Stems™, an innovative breed of fragrance diffuser that will electrify your senses. There’s no wrong way to set your scene: Get creative and personalize it, by mixing and matching different fragrances in the range. Imported. The Scent Scene™ Duo includes two individually packaged Scent Stems™ fragrances. 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. The brand suggests 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