Disposable vapes are the latest trend in vaping. They are cheaper than a pack of cigarettes and can be used straight from the packet. Once finished, they're thrown away.
Izzy is attracted by the colours and the flavours, and the fact she can buy one to match her outfit on a night out.
She used to smoke occasionally at weekends, but she finds vaping a lot more convenient.
"I vape so much more than I ever smoked. On a night out I could get through a whole vape."
Prof John Britton, honorary professor at the University of Nottingham, who advised the government on its recent report on ending smoking, says: "It's inconceivable to say that vaping is safe, it is a balance of risks.
"If you don't use nicotine in any shape or form, it is madness to start vaping."
Prof Britton anticipates that in 40 or 50 years' time, we will start to see people developing lung cancer, chronic bronchitis and other serious lung conditions as a result of their vaping.
And another UCL study suggests disposable vapes are soaring in popularity among 18-year-old vapers, with more than half now using the products.
"So what you've got is young people and teenagers who are probably experimenting with them, but they don't become long-term users," says Prof Linda Bauld, professor of public health at the University of Edinburgh.