Ingredients:
50 ml "Havana Club" rum
100 ml Coca Cola
1 slice lemon

Preparation and serving:
Combine all ingredients in a shaker half filled with ice. Shake well and strain in to a cocktail glass and squeeze the lemon slice.

Variants:
Cuba Pintada: soda nstead of Coca Cola and just a splash of cola.
Cuba Campechana: instead of cola - soda and cola 1:1