Steep Vapors concentrate is an American flavour concentrate designed and manufactured in the United States for DIY e-liquid, in the gourmand family: the Pop Deez The Original version combines popcorn and caramel. It is diluted at 20% in a 50/50 base, then left to steep for 15 to 20 days before use. Made in the USA. Bottle size: 30 ml. Recommended dilution: 20%.