San Franciscans take their coffee seriously. Very seriously. The authenticity and provenance of beans matter to customers, and as a result, third-wave coffee companies abound here. Sightglass is one of the best independently owned and operated roasters. Brothers Justin and Jerad Morrison helped reinvent and redefine the city’s café scene when they opened their flagship SoMA brick-and-mortar coffee shop in 2011, adding lots of warm wood and matte Carrera marble to a warehouse space. Come for perfect cortados, pour-overs, and kouign-amann pastries, and watch the roasting process in the open space. Buy beans to bring home: Its single-origin offerings from Kenya, Ethiopia, Guatemala, and Colombia all stand out. Sightglass also sells an assortment of brew-it-at-home coffee accoutrements, from Japanese wood-handled kettles to chlorine-free filters. Don’t miss the affogato bar on the second level. Pro tip: True coffee geeks should call ahead to see about hour-long cupping classes (think winetasting for coffee). Sightglass also has shops on Divisadero Street, in the SFMOMA, at the Ferry Building Farmers’ Market, and in the Mission District.