As smoking of electronic cigarettes among youths rises, Chapman University assistant professor Georgiana Bostean and her student team are studying the link between "vaping" and aggressive marketing of e-cigarettes to youth, including the proximity of smoke shops to schools. The battery-operated penlike vape devices come in a rainbow of colors and designs and are commonly filled with a mix of liquid nicotine and a flavor called "juice," with colorful names such as Cotton Candy Clouds and Insane Candy Cane.