Skandinavisk's Skog scent diffuser features notes of pine, fir, birch sap and woodland lily of the valley. Named after the Swedish and Norwegian words for "forest", Skog depicts the magical scents lingering in the Scandinavian wilderness.  This refill is designed for Skandinavisk scent diffusers. Once the previous scent has finished, you can simply refill the glass bottle, add your desired amount of rattan reeds and keep enjoying the sophisticated Nordic fragrances. Made from renewably farmed vegetable oils, the alcohol-free and non-hazardous scent lasts for about three months.