This is the tank and atomizer on the Vaporesso Aurora. That's the one that looks like this:
This is the tank with atomizer installed:
Make a rotating cylinder that you load those tiny tanks in like bullets. Current is only supplied to the one in the 'firing' position. An 18650 or 3000+ mAh built in battery supplies power. You rotate the cylinder to the flavor you want. With six 'bullets' it will hold 7.2 mls of juice. Those atomizers fire at about 12 Watts so you are getting about 3.5 packs of cigarettes worth of juice and power when fully loaded. The cocking and trigger mechanisms would detach, move and attach the changing tanks.