After her husband passed away, Katia Apalategui's mother held on to her late husband's pillowcase to keep his unique scent.
"This gave me the idea of bottling a dead person's unique scent so that grieving relatives can keep their loved one's memory alive," said Apalategui to The Telegraph. "We take the person's clothing and extract about 100 molecules [sic] of their unique bodily odour. Then in a distillation process that takes four days we reconstruct it in the form of perfume."
Apalategui worked with scientists at Le Havre University to develop the technique to reproduce a person's distinct odor. That odor, she added, could provide "olfactory comfort" that Apalategui claimed is more effective than photos of the deceased.