Seventeen-year-old entrepreneur Shirah Benarde and her brother Michael pitch the Sharks their drink-spiking defense device, Nightcap, and Shark Lori Greiner is so passionate about it that she makes a quick offer and seals the deal in record time. From season 12, episode 12 of 'Shark Tank.' Watch 'Shark Tank' FRIDAY 8|7c on ABC, streaming, on demand, and Hulu.