With her at-home kombucha brewing kit –The Kombucha Shop – … Kombucha can be expensive – and this "Shark Tank" entrepreneur is making it her mission to offer an affordable alternative. Last night the “Sharks” on ABC’s Shark Tank — a version of UK’s The Dragon’s Den — invested $350,000 in an online kombucha home brew kit supply company.. Field said if she accepts the $350,00 deal for 10 percent of her company’s worth, it will mean that The Kombucha Shop will be valued at $3.5 million. The business made about $1.2 million in sales last year, and now sells the kits on … Like many, she began brewing kombucha as a hobby and decided to share the benefits and the satisfaction of brewing it at home. The Kombucha Shop (TKS) is the brainchild of Madison, Wisconsin-based Kate Field. Founder Kate Field pitched her beverage business on Shark Tank and made a $350,000 deal with Barbara Corcoran and … “I know, it’s pretty nuts,” she said. The Kombucha Shop sells DIY kombucha tea brew kits.