175ml White Rum 125ml Spiced Rum 75ml Triple Sec 50ml Lemon Juice 50ml Lemon Squash 10ml Balsamic Vinegar (Good Quality) 100g Fresh Strawberries 25g Fresh Blueberries 25g Frozen Black Forest Fruits
I diluted this down to about 1.25 litres with crushed ice, but it could have been stronger without being unpleasant. I probably would have used lime juice had I had any but, still, tasty as. :)
Loosely based on this recipe from Cocktail Times.