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Kylie Jenner's secret habit revealed: Reality star, 18, blows smoke rings like an expert while puffing on vaporizer

Kylie Jenner revealed one of her pastime pursuits in a new Snapchat on Thursday.

The 18-year-old shared the controversial video, which was then uploaded on Instagram, showing her seductively puffing on a vaporizer.

And it seems it's not a new hobby for the Keeping Up With The Kardashians star as she showed her prowess at blowing smoke rings during the short clip.

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Quite a pro: Kylie Jenner shows off her smoke ring skills while puffing on an E-cig a new Snapchat she shared on Thursday

Kylie is sat in the passenger seat of a car with her dark locks in braids as she gazes at the camera and takes a puff.

She lets the smoke sit in her mouth for a brief moment before moving her enhanced pout to create the circular vapors.

Of course the clip prompted many users to comment, with some arguing about whether the TV star was smoking weed in the device.

While the gadgets can be used inhale cannabis, they are more often used to smoke atomized e-liquids which can be flavoured and with or without nicotine.