vapes and cigarettes Is Vaping Better Than Smoking? E-Cigarettes (Vapes) | Smoking and

"Lung deposition analyses of inhaled toxic aerosols in conventional and less harmful cigarette smoke: a review"

Cigarettes combust tobacco while vape pens aerosolise liquid, creating a vapour that closely mimics the throat hit and visual appearance of cigarette smoke without the combustion process that produces tar and carbon monoxide

[41] One of the primary features of the more recent generation of devices is that they contain larger batteries and are capable of heating the liquid to a higher temperature, potentially releasing more nicotine, forming additional toxicants, and creating larger clouds of particulate matter

Mailers may use envelopes for odd-shaped items if the mailpiece meets the standards for the class of mail (see 3.3)