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): 8% Recommended Mix (Multiple Flavour Recipe):3% Requires mixing with Vegetable Glycerin & Propylene Glycol before can be vaped. FW Dulce De Leche Concentrated Flavouring We know that all you really want is a delicious tasting, high quality food grade concentrated flavoring, and that’s precisely what we bring you. Widely known as a delicious Mexican dessert; Dulce De Leche taste like a sweet creamy caramel.