Tae Rianmek looks me in the eye while shaking his head. “No americano,” the barista says. It’s not on the menu here at Mother Roaster , a Talad Noi coffee shop that specialises in freshly brewed drip coffee made with a wide choice of Thai-grown beans. With his patient, expert guidance, I opt for Sirinya Coffee Farm beans from Mae Suai, a district in Chiang Rai. I watch the dark liquid drip through a filter, then enjoy a smooth cup with plum notes while pondering how little I know about coffee – and how much this area, one of Bangkok