Flavor West flavour concentrates are Naturally and Artificially Flavoured. Made in the USA & Rebottled by Vapour Depot in the UK. Available Sizes: 10ml, 30ml, 100ml Recommended Mix (Single Flavour): 15% Recommended Mix (Multiple Flavour Recipe):5% Requires mixing with Vegetable Glycerin & Propylene Glycol before can be vaped. FW Birthday Cake Concentrated Flavouring We know that all you really want is a delicious tasting, high quality food grade concentrated flavoring, and thats precisely what we bring you. Who doesnt love cake? The rich blend of sweet cake and creamy frosting is sure to make you smile