I've wondered the same thing about safety, but heck, vape is safer than analogs. I picked up a couple of SmokTech Ego Dual Coil Cartomizers (holds upto 5 ml) from MBV just to vape some clearo killer flavors. I've enjoyed my Carto thus far. I have this on hand and topped off just for a switch in flavor or for when I don't want to mess around with tanks (like in the car, out walking, out and about on the town, etc.). It's small, and I wouldn't cry if I lost it. Something to think about. Another suggestion could be getting a Vivi Nova tank with a metal tube instead of the plastic one. My Vapor Store has this option for about $10. I don't have one yet, so I can't speak personally. This might be a better option if you hate the green apple and need to switch out the flavor.