Over time, I have collected quite a selection of flavors from different vendors.  I would just kind of line them up in a neat order and such so it didn't look so discomboberated.  But every time I wanted to get a flavor, taking a bottle out and putting it back would scatter how things were set up.  I decided to take one of each sized bottle to Home Depot.  I had seen 2 ft lengths of pvc piping for sale and thought if I just got the right size, I could build a rack where everything was in it's place.  I cut the pieces about 3/4" lengths and superglued them into whatever layout I wanted.  This holds my 15 ml TFA bottles, the 30 ml from vendors as well as my clearomizers.  For a little more ease, I set this on a Lazy Susan.