If you love fragrances and want your perfumes to last longer, keep them out of the bathroom. Fragrances are susceptible to two things: light and temperature shifts. A bathroom heats up and cools down quickly when it's used (imagine a hot steam shower filling the room). By displaying bottles on a tray, you're exposing them to UV light that speeds up the degradation process. Instead, keep your fragrances in the boxes they came in, and store them in a dark, cool place like a drawer or closet.