I second the motion for USPlastics, although I have come to prefer the wonderful little 3ml dropper bottles that you can get for 50 cents more from NuVape when you order samples from them.
I didn't even really like their
juice, but I loved their little bottles.
The USPlastics bottles are probably better and more convenient for most people, as you just put your
juice in and then squeeze away whenever you need to. But I have a peculiar circumstance in that I mix up a new batch of 3ml juice combination every other day, and sometimes it needs tweaking, and so I prefer the dropper bottles which are much easier to open all they way to get more drops of flavors in.