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 Natural Butterscotch Concentrated Flavouring We know that all you really want is a delicious tasting, high quality food grade concentrated flavouring, and that’s precisely what we bring you. Delicious and easy to use Natural Butterscotch flavour got its sweet taste from a combination of rich butter, organic brown sugar and other ingredients.