Homemade Milano bitters

'Sebastien Garcia's recipe, good for 5 oz: Place a cinnamon stick, 2 peppercorns, 2 cloves, 1 star anise and 5 strips orange zest into a small bottle (10 oz or less). Add 2.5 oz vodka and 2.5 oz of cynar. Infuse for at least three weeks in a cool dark place.'