i have an MVP-2 and use Kangar T3's. i have about 4 flavors that i love and about 5 bottles each of those flavors. they have the white cap with the flat head on it. i take a paint pen and paint a color, say yellow stripe around the tank at the top and then paint the flat portion of the bottle the same color.
if i'm tired or in a hurry it is easy to grab the tank and corresponding color lid liquid and go.
i also made 15ml bottle holders, take a 1.5 inch wide piece of wood, cut as long as you want, my vape drawer in the table by my recliner is 11" deep so i made 10" long, 1.5" wide strips. drill a 7/8" holes in them...you can get about 8 holes on that size strip of wood, then place in drawer and bottle in hole! keeps them from falling over when the drawer is opened and closed.
did the same thing with a holder for the 10 or so T3's to stand them up full of juice.