Vaping is not replacing smoking. It is often added to it. This is called dual use. Nearly half of e cigarette users still smoke cigarettes. What this means: Smoking continues alongside vaping Study: Juul Pods Contain Caffeine. What's It Doing There, And What Does It Do? Juul Gets Temporary Reprieve to Keep Selling Its E Cigarettes The New York Times How Juul Hooked Teens on Vaping and Ignited a Health Crisis Juul vs. Zyn: Business Book Club #2 by Elyssa Goldberg JUUL Troubleshooting JUUL Pods Dubai