Vaping has produced a diverse community of aficionados with all sorts of subspecialties. One vape-juice "mixologist" sells her recipes for as much as $1,500, while custom-made devices go for $3,000.

In the laboratory of the California Vaping Co., Dakoda Collins mixed up one of his signature potions. California Journal: E-cigarettes appear here to stay: So put that in your mod and vape it ...