A device that helps simplify potty-training; a baked-to-order brownies & cookies mashup. Also, an update on the Roominate inspirational toy business, which Mark Cuban invested in during Season 6.

Silicon Valley venture capitalist, Chris Sacca, joins the Tank as a Guest Shark. He finds himself in a heated battle with Lori over a tech education business; two sports fans have a home rental website; an entrepreneur with a unique twist on everyone's favorite hot drink; and an inventor has developed a device that can inflate objects in mere seconds. Also, an update on SWAG Essentials, which did not get a deal in the Tank during season 6.