JUUL electronic cigarette use patterns, other tobacco product use, and reasons for use among ever users: Results from a convenience sample.

•39.5% of users were daily or nondaily users, indicating high uptake among triers.•Of current JUUL users, only 26% reported current exclusive use of JUUL.•Almost 50% reported current use of JUUL and cigarettes.•In the overall sample, 37% were former smokers.•The top reasons for use centered on friends' use and curiosity of the product