In fact, the liquids that are used in Vape Pens aren’t really liquid at all. The liquids that are found in Vape Pens are known as e-liquid. E-liquid is produced by vaporizing chemical compounds, in fact it is the chemical compound vaporized that truly creates the unique taste of Vape Pens. A lot of people who use e-cigs don’t understand that the specific liquids used are not really liquid at all. In fact, it is possible to use Vape Pens with sugar free e-liquid. The problem with most e-liquids is that they contain way too many chemicals for a safe inhalation, such as for example those found in conventional cigarettes.