I always leaned towards glass bottles, but now I see people writing about the rubber in the cap being a risk? sounds too complicated...
Now I have stored and transfered perfume and perfume oils in many types of plastic bottles, some seemed to last for months, but I have seen some that melted within a week. I am sure e-liquid would not degrade plastic at the same rate (save for potent flavors)...but it seems that plastic is safe for a couple of months, or so I think.
Now to those considering freezing e-liquid, again, speaking from a perfume background, that is not a good idea. Exposing a chemical compound which you do not understand completely to extreme temperatures on both ends of the spectrum can ruin it. Putting them in a fridge is more reasonable (I know many people who bought some of these small, wine fridges, for perfume, some had a glass door which looked pretty cool), but freezing them might ruin the flavor. But again, this might not apply to e-liquid, so do not take my word on it, just keep in mind extreme temperatures is always a risky idea, cold is better than hot for sure though.