I'm not a big fan of just finding small plastic bottles to pour olive oil into.
The reason is that those bottles may not be chemically compatible with OO, which being highly unsaturated (the reason you want it over, say, Parkay or butter) is a fair solvent. There is some nasty stuff in plastic (such as estrogen-analog phtalates, used to keep plastics flexible). Much better in my mind is to buy OO originally in 8-oz. plastic bottles, so you know they're chemically compatible. Stick one of those in each of your mail drops at 2 week or so intervals, and your OO needs are covered.
I've recently found walnut oil in small plastic bottles as well. It has similiar properties as olive oil WRT unsat/sat fat ratio, but likely won't keep as well once opened, due to lower antioxidant levels.