Celestial Seasonings celebrated its 40th anniversary last week. They made it a zero-waste event, served up local food, local beer, and of course, a bunch of the teas for which they've become famous.

During the festivities, I sat down in the Celestial Seasonings tasting room with Kay Wright, the botanicals purchaser for the company for over 30 years. I asked about some of the relationships they have cultivated with farmers around the world over the years and how they maintain the quality of their products. Here are the highlights of that conversation.