In a pitcher, stir together the vodka, orange juice, sparkling water, if using, vermouth and bitters. Pour into 4 iced-filled old-fashion glasses and garnish with a sprig of fresh thyme and an orange slice.
In a pitcher, combine the oregano, thyme and rosemary. Using a wooden spoon, gently crush the herbs. Add the vodka and cover the pitcher with plastic. Store at room temperature for at least 24 hours. Strain before using.
Recipe courtesy of Giada De Laurentiis