The golden Peruvian soda.
In a saucepan, combine the sugar and water. Bring to a boil, stirring until the sugar dissolves completely. Remove from heat and let cool.
In a large pitcher, combine the cooled syrup, lemon juice, pineapple juice, vanilla extract, and yellow food coloring. Stir well to combine.
Slowly pour in the carbonated water to the mixture in the pitcher. Stir gently to combine without losing too much carbonation.
Fill glasses with ice cubes and pour the Inca Kola mixture over the ice. Serve immediately.