Every once in a while I have to ask myself "Why do they do that". I'm sure others here have questioned "
Why" do they do this or that? With that In mind I have to ask
"Why do some companies put their e Juice in those hard plastic bottles that you can't even squeeze a drop out of......when there are better alternatives for your clients?" 
My hands are getting old and tired. WHY do they put me through that?
It's easy to make a plastic bottle.
Now to make a plastic bottle that is clear/transparent.. no biggie; narrows down your range of options as to what type of plastic to use.
Now to make it also soft so you can squeeze it... ok, that narrows things down a whole lot again.
Now you want to have a plastic that is not reactive to the liquid substance you put in it!!
Ok, now that's going to narrow things down much more drastically, and even then there's going to be some liquid out there that will react with it,
so you have to compromise somewhere;
either its soft but foggy
or hard but clear
or maybe you got to be carefull not putting certain liquids in that bottle like cinnamon or citrus or menthol