The wall of flavor. We keep the shelves fully stocked with Crossbar, Loon, and all your other favorites so you never have to settle for a flavor you don't want. Janesville, Research indicates that certain flavoring chemicals used in e cigarettes can irritate lung tissue and trigger inflammatory responses in laboratory settings. Some compounds, such as diacetyl, have been linked to respiratory damage when Ah yesvaping studies saying they contain diacetyl. : r Vaping Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes Do Geek Bars Have Diacetyl? EightVape