Japan, South Korea, Brazil, the UK, Germany, Indonesia, and Mexico are the seven named countries in this study
Propylene glycol was used for its ability to mimic the throat hit of a traditional cigarette, while vegetable glycerin was included for its ability to produce thick vapor clouds
Including 'cigarette' in the name is confusing and does little to help public understanding of these devices", said Amanda Sandford, its research manager
Cigarettes are highly toxic and are not meant to be used or consumed by children
In the first clip, which has since been viewed more than 17.6m times, Rose films as a man wipes the yellowish-brown walls only to unveil white paint, and later pours the discoloured water down the drain