Seth Rogen and Mikey Mohr grew up together and went on to have successful careers in Hollywood and on Wall Street. Now, the longtime friends have embarked on a new venture: building Houseplant, a thriving lifestyle company born of the contemporary cannabis culture that Rogen has helped define. They make products including ashtrays, lighters, and rolling papers, and have now launched a THC-infused beverage line. How big do they think the brand can get? And does it matter that marijuana legalization may be in limbo in the U.S.? Let's find out.