Agung Prabowo built Hong Kong's first closed-loop cocktail bar inside a white-tiled, science-lab-inspired space on Hollywood Road, and the sustainability commitment runs deeper than aesthetics. An in-house climate-controlled fermentation enclosure produces organic ferments from upcycled ingredients; local produce replaces imported spirits wherever possible; and the One Penicillin, One Tree programme plants a Kalimantan rainforest tree in Borneo for every signature cocktail sold. Ranked No. 27 on Asia's 50 Best in 2025, Penicillin proves that environmental responsibility and world-class cocktail making strengthen rather than compromise each other.