Further to the above, the Directive also provides specific product requirements for electronic cigarettes, such as maximum nicotine levels (20 mg/mL), volume requirements for refill containers and cartridges, and mechanical requirements for electronic cigarettes and refill containers
For instance, the European Union no longer allows the sale of 10-cigarette packs because they could encourage smoking by lowering the cost of entry
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Fast-forward a few decades to 2007, and the flavored capsule took a new turn when the release of menthol-flavored capsule filters in Japan introduced a new resurgence for this niche product, with capsules no longer limited only to menthol but also including flavors such as clove, spearmint, lemon mint, apple mint, grape, berry, etc