Juul is a brand of electronic cigarette that was launched in 2015. It is designed to deliver nicotine through a vaporized liquid, often referred to as e-liquid or vape juice. The device is compact and resembles a USB flash drive, making it discreet and easy to use. Users insert flavored pods that contain nicotine, which is heated to create an aerosol that can be inhaled. The popularity of Juul has raised concerns about its appeal to young people, as it offers various flavors and a high nicotine concentration. This has led to discussions about vaping regulations and the potential health risks associated with nicotine use, particularly among adolescents.