@Anise - Are you looking specifically for glass bottles to put your nic base in, for freezer storage? Or are you looking for bottles to just put your newly made eliquid in?
Reasons I ask those 2 questions:
1) If they're for
nic base freezer storage, I recommend the ones IDJoel linked you to, with the polycone caps. They're the kind most of us on ECF seem to use for that purpose.
2) If they're for
eliquid though, most just use the PP or LDPE fairly soft, squeezeable, plastic bottles...with a dripper tip and cap on them.
If they're for eliquid and you definitely want glass...you don't really
need the polycone cap (if a few cents higher cost for them matters). There are some with a regular screw-on cap that are slightly less expensive.
Using glass bottles with screw-on caps of any kind though, would mean you'll need something to dispense it into your tanks (probably pipettes or syringes) or into eliquid dropper tip bottles (with a funnel probably).