Ingredient !
1 ounces Campari. 1 ounces sweet vermouth. 3 ounces soda water (or club soda, as needed to fill glass). Garnish,  ​lemon twist or orange slice
Preparation !
Pour the Campari and vermouth into an old-fashioned glass filled with ice cubes. Top with soda. Garnish with a lemon twist or orange slice.