Dark adds a whiskey aroma to your tobacco or herb mix. RYO Aroma is applied by spraying the flavour directly on to your tobacco or herbs. Each 30ml bottle can flavour up to 5kg, but even a small amount sprayed on to your mixture is very satisfying. RYO Aroma contains glycol which balances the amount of moisture in the product. Supplied in an easy to use spray bottle for easy application.