If you're looking for an alternative to "A Ginjinha", the most traditional place in downtown Lisbon for you to taste the typical Portuguese liqueur made with "ginja" berries, this is the place! It is actually located pretty close (60 meters) to it competitor, which enables a pleasant experience of comparing both brands, which are characterized by distinct tastes and densities! You can find both shops at Largo de São Domingos, right next to the Rossio Square.
Please note you can always find several brands of ginjinha liqueur in all of Lisbon's supermarkets, at their beverage sections, where you can find lower prices.