Swedish-born interior designer Sanna Völker has created ‘Nostalgia’: a set of chic candle holders that explore the senses by working both as vessels for intimate lighting, and as natural aroma diffusers. Designed as part of ‘Perception’, an exhibition curated for Barcelona Design Week, ‘Nostalgia’ consists of two welded steel candle holders. One uses a volcanic rock with essential oil that is warmed by the heat of the candle to become a diffuser...