Baddies in a whiskey bottle

Someone needs our help. It does sound familiar. Any ideas?

Dear Sirs. I hope this letter finds you doing fine.
I’d like to tell you my story. My father used to take me to the movies when I was child (sometime around 1968 or 1969 maybe later). I remember one scene of a movie at that time that touched me very deeply and the only thing that I remember of that movie is that the “hero” of the movie was walking along the street carrying a whisky bottle and some badasses were planning to kill him. While he walked along the street the reflection of the bottle showed him where these bad guys were hidden and then he killed them (I suppose so).
Do any of you know what movies was it? I’d appreciate very much if you help me to find out the name of the movie that marked me since then.