Formulated Vape Co is a Vapour Depot brand. The idea was to take some of our most popular classic house juice flavours and reformulate them into something new & unique, whilst maintaining the flavour profiles which made them popular. Flavour Profile: Apple, Biscuit, Custard Recommended Mix Percentage: 20% Recommended Steep Time: 14 Days Requires mixing with Vegetable Glycerin & Propylene Glycol before can be vaped. The Formulated Vape Co Apple Crumble Concentrate - What\'s better than a hot apple crumble & white custard? Nothing of course! Experience the taste sensation that is the brand new Formulated Vape Co Apple Crumble, with tart green apples, biscuity crumble and lashings of vanilla custard, it\'s a dessert lovers dream.