Stylish Vape Pen Holder and Cartridge Organizer Durable Multi device Stand for Vape Pens, Cartridges, Accessories & USB Charger Etsy Going completely smoke free is difficult for many, but did you know that nicotine has been found in e cigarette liquids claiming to be 'nicotine free?' While e cigarettes don't contain tobacco, they may still How to Fill and Cap 510 Thread Vape Cartridges for Reliable Production iKrusher What's in an e liquid or vape juice? The main ingredients are propylene glycol (PG) and vegetable glycerine (VG). These are solvents that are basically used to dissolve and carry the other ingredients.