Vaporizers of all shapes and sizes will line store shelves.

Catharine Candelario, an employee at the newly opened Henley Vaporium, vapes, or smokes an electronic cigarette, on December 19, 2013 in New York City. The New York City Council on Thursday will vote on a bill that would add electronic cigarettes to the city's strict smoking ban. If the Mayor Bloomberg backed ban is approved, the city would give businesses and restaurants a year to put up signs indicating there is no smoking or vaping allowed. The Henley Vaporium features a smoking bar and a coffee bar where tea and snacks are served in a relaxed environment. (Photo by Spencer Platt/Getty Images) Spencer Platt/Getty

Vaporizers, an extension of the e-cigarette fad, are electric devices that apply heat to dry flowers or marijuana-infused liquid and create an inhalable vapor. Vaping is cheaper and healthier than smoking, and the industry is only now heating up.

In 2015, the retail vaping industry is expected to rake in $3.5 billion, more than twice the $1.7 billion estimate for 2013, a Wells Fargo Securities analyst tells CNBC.

New users are drawn to the devices because of the variety of smart, discreet models that are quickly being introduced at every price point. There's something for everyone, from disposable vape pens slim enough to double as a writing utensil to the "iPod of vaporizers."