(CNBC) — At S'well, water bottles cost up to $45, and still, sales are brisk.
Sarah Kauss knows her S'well bottles are pricey, but she's proven people are willing to shell out for the distinctive bottles, which keep drinks cold for 24 hours and hot for 12.
Last year, the company generated $50 million in sales, a sharp uptick from $10 million the year before, said Kauss, its founder and CEO. While S'well has generated strong numbers since opening in 2010 and is now sold in 35 countries, things didn't always go swimmingly.
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