Kylie Jenner isn't known for small measures. A star of the reality TV show Keeping Up with the Kardashians since 2007, Jenner has parlayed her celebrity into a business empire that includes a clothing line and the companies Kylie Cosmetics and Kylie Skin. Earlier this year Forbes estimated the 22-year-old's net worth at $1 billion, making her the world's youngest billionaire — reaching the mark sooner than Facebook's Mark Zuckerberg or Snapchat's Evan Spiegel.
When Kylie Skin was preparing to launch Jenner's first skin care products last May, the company debuted what is believed to be...