Back home from a fantastic trip to Costa Rica with a bounty of Guaro Cacique, the national drink of Costa Rica. Thanks, Silvia and Tito! (She Costa Rican, he Brazilian; they introduced us to the drink and a great night of laughs.)
Silvia's recipe calls for a shot of guaro, fresh lime juice, club soda, and salt to flavor, all over ice. For precise quantities, I suggest trial and error. It's much more fun that way.