Olay has tapped fashion designer Christian Siriano as its first chief drop officer.   Siriano’s named role is inspired by the skincare brand’s latest innovation, the Super Serum. The serum, which reportedly outpaced the No. 1 luxury serum in clinical trials, comes in a small, but impactful dropper that influenced Siriano’s new title, according to the brand.   The groundbreaking product offers five-in-one benefits – helping to improve skin texture, even skin tone, firm skin, smoot...