Rösterei VIER (RVTC) is a specialty coffee roastery and café based in Düsseldorf. They present a transparent, taste-focused offering, and roast small batches of single-origin coffees, among which are interesting producing regions in Malawi, Yemen, India, Panama and Zimbabwe. The roastery emphasises direct sourcing, sustainability and quality: many producer relationships are long-standing, and the company is combining precision in roasting with environmental and social commitments at origin.