Homemade Milano bitters

Sebastien Garcia recipe sufficient for 100 ml: Using a small bottle (300 ml or less), add a cinnamon stick, 2 pieces of peppercorns, 2 pieces cloves, 1 star anise and 5 strips orange zest. Add 50 ml vodka and 50 ml of cynar. Infuse for at least three weeks in a cool dark place.