Sustainability and innovation take centre stage at Penicillin, a bar that has earned a place on Asia's 50 Best Bars list for its environmentally conscious approach to mixology. As Hong Kong's first "closed-loop" bar, Penicillin has redefined the traditional bar model by incorporating zero-waste practices and sourcing locally. From reducing food waste to upcycling ingredients, every element at Penicillin reflects a commitment to sustainability. The bar's menu highlights creative cocktails with a purpose, such as the "One Penicillin, One Tree," a drink that supports global reforestation efforts with each order. The cocktail itself is a riff on the classic Penicillin, made with whisky, ginger, and lemon, but with sustainable twists. The bar's eco-friendly ethos extends to its minimalist, industrial décor, providing a fitting backdrop for its innovative cocktail creations.