Top Shelf Premium French Oak 50ml Used to oak age spirits and wines. Ideal for brandy, whiskey, dark rum and bourbon. Mixing Instructions: Shake well before use. Ideal for Brandy, Whiskey, Dark Rum & Bourbon. Add 1 to 5ml (0.03 to 0.17 US fl oz) per litre (34 US fl oz) to taste. Store Spirit for 7-10 days to allow Oak character to fully develop.