New Delhi, Jan. 25 -- Jake Miller, founder of coffee accessory company Fellow, believes that one should do something they are passionate about. Speaking to Fortune about how he grew his company despite 73 rejections from institutional investors, the entrepreneur said the difficult times provided a litmus test: Does this career get me out of my bed in the morning without any pay?

For Miller (41), founding Fellow was that career path. "Great entrepreneurs all think the same way. Nothing was going to stop me," he told the publication. The San Francisco-based company now has over 100 employees.

The report noted that from raising money through crowdfunding, the company has grown to attract $30 million in a recent Series B round from investor...