La Mundial Barcelona is a small producer based in the city, making wine-based aperitivos that are radically different from anything else on the shelf. Their Clarea and Rosalea start life as Penedès wine before being blended with natural fruit extracts and spices and given a gentle fizz, resulting in something low in alcohol but big on character. Serve ice cold with a twist of lemon or orange and you've got the easiest aperitivo in Barcelona, no passport required.