Hello. I am looking for a short story by Asimov. It involves a few men searching for an object that will grant the thing you want most when you possess it. It may have been a glass vial or something? The man has been searching his whole life for it, but when he finally finds it, it disappears, because what he truly enjoyed in life was the search for it, which he then realizes. I believe it also grants his partner a bottle of bourbon or something. Any help is greatly appreciated. Thank you.