I didn't know this but apparently some vape products have significant quantities of alcohol.

Not only could this set off alcohol detection devises like the portable breath tests used by

police, the inhalation of the alcohol can affect the person's ability to drive.  That makes 

vaping a possible cause of DUI!  Of course, any drug that causes intoxication can be 

the basis for a DUI.  But here in addition to the nicotine it appears that alcohol is being

inhaled and absorbed

https://www.cnbc.com/2016/01/13/alcohol-in-e-cigarettes-can-affect-vapers-study.html

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5171208/pdf/nihms799084.pdf