TFA flavour concentrates are Naturally and Artificially Flavoured. Made in the USA by The Perfumers Apprentice& Rebottled by Vapour Depot in the UK. Available Sizes: 10ml, 30ml, 100ml Recommended Mix (Single Flavour): 10% Recommended Mix (Multiple Flavour Recipe):4% Requires mixing with Vegetable Glycerin & Propylene Glycol before can be vaped. TFA Dark Rum Concentrated Flavouring A large range of flavours for use in various applications such as: Baking, Candy-Making, Carbonated water (soda flavors), and many other applications that have fun with flavors!. Our newest rum might be the black sheep of the family. Sweet, spicy and with deep dark caramel notes, Dark Rum Flavor will have you joining the dark side. Great by itself or with a mixer.