I tried my first glass in the city"s Colón Market, a striking Art Nouveau edifice that recalls renowned Catalonian architect Antoni Gaudí, and instantly could see the appeal. Sweet, cool and refreshing, it"s essentially like drinking tiger nuts – after all, the only other primary ingredient is water – and contains all their nutritional properties to boot. The only caveat was the extra sugar, something I"d argue isn"t needed but is a popular addition.