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, Understanding Popcorn Lung and Diacetyl: Risks and Prevention Vapestore Blog All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk Understanding Popcorn Lung and Diacetyl: Risks and Prevention Vapestore Blog Dr Farsalinos E Liquid Study Finds Diacetyl Present