I never understood why cigarette companies havn't made a fake cigarette that doesn't have any tobacco in it, would appeal to teens who think it makes them cool to smoke, lowers teen smoking, and high chance of those teens growing up to smoke real cigarettes, best of all, its completely legal, they could even put nicotine in it! Its a horrible, evil plan but I honestly think it's genius.
Yeah, e-cigarettes are a thing -- but don't bother with the ones you get at convenience stores/gas stations, those are overpriced garbage. If you absolutely have to have one the general size/shape of a real cigarette, get the Halo G6 from [link]
Otherwise, go for an eGo starter kit, which you can get from lots of places online, including [link]