Long Island Iced Tea

1/2 measure/2 tsp white rum
1/2 measure/2 tsp vodka
1/2 measure/2 tsp gin
1/2 measure/2 tsp silver tequila
1/2 measure/2 tsp Cointreau
juice of half a lemon
1/2 measure/2 tsp sugar syrup
4 measures/6 tbsp cola