“The beer that made Milwaukee famous”
I guess you know that “Sally sits on Schlitz all day.”
Until around 1955, when they changed the formulation. New owners of the company decided that Americans drank beer so cold that taste didn't matter all that much. Cheapen the ingredients and you have a less tasty beer.
The first cold swig is the one that refreshes you, but the bottom of the bottle is what you remember tasting the most, and it's not so cold by then.