Sarah Kauss started S'well with $30,000 of her own savings, an optimistic two-page business plan she wrote at a spa in Arizona, and the conviction that a water bottle could be about more than hydration. She had no marketing budget, no manufacturing experience, and no playbook. What she had was a restless curiosity, an HBS network she knew how to use, and a product that people picked up, shared, and told stories about without being asked. Fifteen years later, S'well had displaced more than four billion single-use plastic bottles, landed in Starbucks locations around the world, and crossed $100 million in annual revenue. Sarah and Sherri sit down with Sarah Kauss, MBA 2003, to talk about the winding road from CPA to founder, the lessons hypergrowth teaches you whether you are ready or not, and what it actually feels like to sell the company you spent a decade building.Guest Introduction:Sarah Kauss is Managing Partner at Avignon Partners, where she invests in and advises brands across retail, tech, and wellness. She is the founder and former CEO of S'well, one of the earliest lifestyle sustainability brands, and one of the most recognizable consumer products of the last two decades. She bootstrapped the company on $30,000 of her own savings and grew it to over $100 million in annual revenue. S'well helped displace more than four billion single-use plastic bottles, and the original bottle was named one of 25 designs that helped shape the world by Architectural Digest. Sarah held the CEO role for ten years before selling the company in 2022. She is a member of the 2018 Class of Henry Crown Fellows and the 2020 Class of Braddock Scholars within the Aspen Global Leadership Network. She earned a BS in accounting from the University of Colorado Boulder and an MBA from Harvard Business School, class of 2003. Key Takeaways:• Restlessness is not a flaw. It is a signal. Sarah spent years at EY watching her clients build things while she crunched their numbers, and that discomfort eventually pointed her toward the right door.• The gift of time is underrated. Sarah used her HBS years to go to every presentation, every speaker, every happy hour. She did not know what she wanted. She knew she needed to see everything before she decided.• An idea worth building starts with a problem you cannot stop thinking about. The water bottle concept was not a business calculation. It was a hike on a hot day colliding with a dense book about the water crisis and a conviction that she was the person who should solve it.• Your network is your first team. Sarah did not have a manufacturing partner, a web team, or a marketing budget. She had Section J. She called classmates who knew what she didn't, and they showed up.• Organic growth is still the most powerful kind. S'well never spent money on marketing in its early years. The story was so aligned with the product that customers became the marketing engine on their own.• Hire for where you are going, not where you have been. The hardest lesson from hypergrowth was learning to up-hire ahead of the moment, not after it had already passed.• Motherhood changed the math. Becoming a mom made Sarah a sharper decision-maker. She says no to things now that her younger self would have taken without blinking, because her time is shared with someone else.• Selling a company you built is its own chapter. The day after the sale, Sarah showed up to her HBS 20th reunion and did not know how to introduce herself. Identity and business are harder to separate than you expect.Chapter Markers:00:00 Introduction & Welcome 02:19 Early Life & Identity Formation 07:34 The Road to HBS 13:43 The Arizona Epiphany & Birth of S'well 18:40 Hypergrowth — $10M to $100M25:20 Motherhood & What Changed 29:19 Knowing When to Sell 32:14 Life After S'well 34:05 Rapid FireKeywords:Sarah Kauss, S'well bottle, women founders, bootstrapped startup, sustainable business, purpose-driven brand, women entrepreneurs