Love the idea, I have about 4 attys in front of me all with pale yellow liquids in, and a few behind me with some red / orange liquids in. I've no idea which is which until I attach a battery actually try them. For that reason I suspect it's gonna be fairly obvious which is which, although on saying that my flavors are Mango, Tobaccos, Cola, RY4, more Tobacco, and a few other exotics I can't name off the top of my head. I tend to have 2-3 with tobaccos in, and I can tell which one is the Valley Liquids tobacco (it's a very nice kind of sweet - amazing juice if anyone is looking for something sweet but reminiscent of a real JPS blue cigarette), and which ones are VapingLiquid.com (two mildly different flavors, one quite dry the other quite moist with a fair amount of smokey tone to it). Would be good to see though - especially in someone with a strong gag reflex.