The biggest difference between cores and rings is that rings passively refill over time, but you have to refill your cores on purpose (more on this below)
This is a small study that speaks to the possibility that nicotine-free vaping is not safe
and are manufactured by Swedish Match, Altria, and RJ Reynolds, respectively
Please include a contact number if you are willing to speak to a BBC journalist
"Health warning as nine youths collapse after using 'Spice' vape"
It focuses on four major topics, 1) manufacturing (cigarette automation, American Tobacco monopoly and break-up), 2) engineering (tobacco blending, flavors, and additives), 3) misconceptions of reduced risk (filters, ventilation, hidden features, low tar), and 4) marketing (line extensions, advertising, products that enable smoking).