If you're thinking of storing eliquids for more than a few months, I suggest putting the juices in glass. My tobacco-type flavors are in one shoebox; the "other" flavors (mostly menthol, mints and citrus) are in another. Both boxes are kept in the coolest part of my basement, where the temperature never rises above 68 degrees. In this same place I store about 40 pounds of pipe tobacco -- all in vacuum tins or tightly sealed Mason jars -- gently ageing. (Many types of pipe tobaccos improve considerably with years or decades of ageing.) Despite the pungency of many of the pipe tobacco mixtures, the little root cellar has been odorless.
But lately, when I've opened the eliquid boxes, I've noticed the "'baccy" one smells like a warehouse full of cigarette cartons and the "other" box smells like a veritable rainbow of scents. Plastic bottles are slightly permeable. If aromas are escaping from the insides, I have to believe potentially bad things are diffusing through the plastic and into the bottles.
After I finish this post, I'm ordering a BUNCH of little glass bottles with tight caps, not with eyedroppers!