I dont think you'll find a sterile vial anywhere OTC, but you could always make your own. Buy a small bottle of cheap perfume, wash it very thoroughly, boil it, rinse it out with alcohol, BA if you have it, and then steam it by holding it with a knife or fork over a boiling pot. You'll need some sort of stopper if the bottle's original top wont do. By then I know It'll be as sterile as anything you could buy.