This is what I use. It holds about 1.5 Oz. The dropper tip plugs into the top of the bottle and the screw top seals it tight. I have several and am not sure where I got them, but a pharmacy might be able to set you up. If asked, they'll often just give you vials or bottles for free.



I also have an old 4 Oz ProLink lube bottle that has exactly the same type of top and cap. It's not like the newer ones with the flip spouts.