How I Built This with Guy Raz

In 2010, Katrina Lake recruited 20 friends for an experiment: she wanted to see if she could choose clothes for them that accurately matched their style and personality. That idea sparked Stitch Fix, an online personal shopping service that aims to take the guesswork out of shopping. Today, it has about three million customers and brings in more than a billion dollars in annual revenue. PLUS in our postscript "How You Built That," we check back with Justin Li, who created wearable equipment to keep cool and hydrated called IcePlate.

In the late 1980s, Curt Jones was working in a Kentucky lab, using liquid nitrogen to flash-freeze animal feed. He wondered if he could re-invigorate his favorite dessert by pouring droplets of ice cream into a vat of liquid nitrogen and – voila! – out came cold and creamy pellets that he soon branded Dippin' Dots. The novelty treat spread to fairs, stadiums and shopping malls, and eventually grew into a multi-million dollar brand. But a few years ago, Curt was forced to walk away after the company was hit with debt, recession and a punishing lawsuit. PLUS in our postscript "How You Built That," how Nadine Habayeb hopes to popularize puffed water lily seeds from India with her snack brand Bohana.

In the late 80s, brothers Bert and John Jacobs were living as nomads, traveling from college to college selling t-shirts out of their van. It wasn't a sustainable living – until one day, they created a new design. It was a simple sketch of a grinning face, with three words printed underneath: Life Is Good. The optimistic message was deeply personal to the brothers, who grew up in what they describe as a dysfunctional home – and it also resonated with customers, who started buying Life Is Good designs printed on just about anything, from towels to tire covers. Today, the Life Is Good Company has a reported annual revenue of $100 million. PLUS in our postscript "How You Built That," Jim Malone of CounterEv Furniture describes how he turns reclaimed wood from bowling alleys into tables and chairs for fast-casual restaurants.

Cotton muslin baby blankets are commonplace in Australia, where Raegan Moya-Jones grew up. But when she started a new life and family in NYC, she couldn't find them anywhere. So in 2006, she started the baby blanket company Aden + Anais, which now makes more than $100 million in annual revenue. We first ran this episode in 2017 – but about a year later, Raegan's role as leader and co-founder took a dramatic turn. She fills Guy in on what happened in this special updated episode. PLUS in our postscript "How You Built That," we check back with Brian Sonia-Wallace, who started the business Rent Poet, and makes a living writing spontaneous poetry at weddings, corporate events, and other gatherings.

In 1983, two hippie farmers decided to sell homemade organic yogurt to help raise money for their educational farm in New Hampshire. As the enterprise grew into a business, it faced one near-death experience after another, but it never quite died. In fact it grew — into one of the most popular yogurt brands in the US. PLUS in our postscript "How You Built That," we check back with Carin Luna-Ostaseski, who became the first American woman to start a Scotch whisky company after she created her own blend called SIA Scotch.