It just means more flavor...I find the regular level of flavor to be quite satisfactory, but when I was first starting out and my tastebuds weren't fully back yet, I needed a little extra kick of flavor to convince myself that my e-cig wasn't broken, and e-
juice tastes like something. I still enjoy double flavor, because it makes a lot of milder or gentler flavours *pop* (As Mindfield would put it). I ordered a triple shot of zero-nic
juice once. It was definetely vapable, and tasted great, but I don't think I needed that much *POP*