The cheapest e cigs are usually available for less than $100, with some costing as much as $200.
There are currently more than 200 e-cigarette manufacturers around the world, with more than 30 brands in the United States.
However, the cost of a bottle of e-juice has soared, as the price of e cigarette vapours has gone up as well.
According to the latest report by e-cig brand Vapouriser, the average price of an e-liquid at the e-tailer has doubled in just two years.
The company is also working to make e-liquids more accessible to young consumers.
The e-cigs are designed to help smokers quit and are known to deliver a ‘nicotine buzz’ to help them quit.
However, e-bikes are gaining popularity in the same market segment.
In March, the National Tax Authority said e-bike sales had increased by more than 20% in the last three months of the year, according to the Times of Indian.
Many brands are also selling e-gels, which are a combination of liquid nicotine and carbonated water.
Vapourisers has said it will soon launch its first e-gel product, the e juice, which will be sold exclusively online.
E-cigarettes have become a popular way to quit smoking, but they also help people stop smoking for a variety of reasons.
Some smokers say they want to quit because e-tobacco cigarettes have become increasingly popular, and they want cheaper, more natural alternatives.
If you or anyone you know needs help, call Lifeline on 13 11 14 or the Suicide Prevention Lifeline (1800 659 467).