Soma, a startup that’s hoping to be the Warby Parker of water filters, has closed a $3.7 million round of seed funding led by Baseline Ventures and Forerunner Ventures. Other backers include Lerer Ventures, Collaborative Fund, Cowboy Ventures, Vast Ventures, Mindful Investors, The 4-Hour Workweek’s Tim Ferriss, Coca-Cola’s Rohan Oza, and Sukhinder Singh Cassidy of JOYUS.

The San Francisco-based company, which raised $150,000 from over 2,000 backers through a Kickstarter campaign in 2012, closed a $1.2 million initial seed round last summer.

Targeted at do-gooder design and sustainability snobs, Soma produces glass carafes fitted with biodegradable water filters. It’s a subscription service where consumers buy the carafe and starter filter for $87, and Soma sends a replacement filter every two months for $14.99.

For every filter that sells, Soma donates money to charity: water, which funds clean water projects around the world. This one-to-one model is well…

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