Kourtney Kardashian hit a major milestone in her life! The 46-year-old reality star took to Instagram Stories on Friday to promote the launch of her sister Khloe Kardashian's new Khloud popcorn flavor. It's truffle white cheddar, if you're curious. While doing so, Kourt revealed her own massive accomplishment - three years of sobriety! Wow! Related: Matt Damon Opens Up About Helping Ben Affleck Amid His Divorces & Addiction Struggles The POOSH founder posted a video showing off an activation where she was presented with a sample of the latest popcorn flavor.