Further speaking of glass

So far I have mostly been getting the liquids in small bottles just to test the waters and some in larger well 30ml.
All have been plastic and thats fine (More into the liquid taste etc atm) Though one batch from one company was rather hard to squeeze to get the liquid out. Is glass good/better as an option and I read they come with a dropper , if so is the tip of the dropper small enough to add the juice to smaller clearomisers? My Nautilus I'm using atm is ok rather wide tank to fill but someone is still liking yeolde ce4's.
I see different companies will be different but just wondering about personal experiences.
If you were to store Liquids for say longer than 6 months is leaving them in plastic ok or should you transfer to glass ?