Vape mods are great if you want a refillable vape with longer lasting batteries. The coils, tanks, and mouth pieces are all interchangable. A top reason for having a vape mod is that you can put whatever percentage of nicotine juice you want and there are an infinite amount of flavors you can put in your tank. There are tons of styles to choose from ranging from small to large. Most come with adjustable air flow and they come in many colors.