1/2 oz Cointreau® orange liqueur
1/2 oz armagnac
1 tsp lemon juice
1 bottle cold cola

Funnel the cointreau, armagnac and lemon juice into one small cola bottle (185-200ml), roughly half-filled with cola. Briefly invert the bottle to mix the ingredients. Place in the center of a large glass (tankard, stein or british pint), and fill glass with broken ice. Add a straw to the bottle, and serve.