Chefs Flavours concentrate is a British range of flavour concentrate for DIY e-liquid, in the fruit, gourmand and fresh families: strawberry, blue raspberry, mango and guava, vanilla with cream and coconut, biscuit and lemon. It is composed of propylene glycol and flavourings, diluted in a 50/50 base. Steeping takes 1 to 15 days. Made in the UK. Bottle size: 30 ml. Recommended dilution: 15% to 24%.