The devices work by heating a liquid that typically contains varying levels of nicotine, as well as propylene glycol, vegetable glycerine and flavouring
However, critics say that e-cigarettes are just another way to get people hooked on a lifetime habit and point to flavors such as watermelon and chocolate as ways to attract young consumers
If our PSs current is equal to or higher than original ones, then our PS will work with your device
Researcher Dr Sarah Jackson said this could be because they were less affected by the recent sharp rises in cigarette prices
Ozone can be harmful to humans and pets while its active
Unused cigarette filters contain 4,000 compounds, many of which are harmful, while smoked cigarettes can include 7,000 distinct chemicals