So I have two places local that sell juice. One place, the place I got my vaper from has them in sealed bottles. I've only tried menthol from them. The other place they have your flavors but then can add sweetner, flavor, and even menthol to the base flavors they sell. There's are a buck cheaper then the other place but after two 10ml bottles I'm having a problem sometime that it tastes burnt. Now its possible I'm calling wrong. But my question is in regards to quality. Are there different quality's of juice?How cacan't I tell who has the better juice? I think I'm going to go back to the original place tomorrow and get a flavor to compare. Any help is appreciated.