A new device known as an “e-joint” brings together marijuana and an e-cigarette, The New York Times reports.

A brand of e-joint, JuJu Joint, holds 100 milligrams of THC, the psychoactive ingredient in marijuana—twice as much as a traditional joint, the article notes. It is disposable and comes filled with 150 hits. The device produces no smoke and has no smell.

JuJu Joints were introduced in April in Washington state, where recreational and medical marijuana is legal. So far, 75,000 devices have been sold. The maker of the device says 500,000 more will be sold this year. The company plans to expand to Colorado and Oregon, where recreational marijuana is legal. It also plans to bring the device to Nevada, which has decriminalized marjiuana.

“In some ways, e-joints are a perfect storm of a problematic delivery system, the e-cigarette, and in addition a problematic substance, cannabis oil,” said Dr. Petros Levounis, the chairman of the psychiatry department at Rutgers New Jersey Medical School.

JuJu Joints inventor and co-founder Rick Stevens said each inhalation is metered by the device. “Our goal is not to get people stoned so they sit in the corner and vegetate,” he said. Stevens noted, “I wanted to eliminate every hassle that has to do with smoking marijuana. I wanted it to be discreet and easy for people to handle. There’s no odor, matches or mess.”

The devices cost $65 to $100 each, one-quarter of which goes to Washington’s Liquor Control Board. At medical dispensaries, the devices cost a suggested donation of $25. While smoking marijuana in public is illegal, customers say they have used JuJu Joints while hiking, skiing and attending concerts.

JuJu Joints can only be purchased by adults 21 and older, but law enforcement agencies say they are concerned the devices are already being abused by teenagers.