>What I am curious about is (1) what does growler mean today?
A "growler" is a 64 ounce container of beer. The Florida legislature
is currently voting on a bill to allow the sale of "growlers".
Currently, it is illegal to sell beer in that size container. Florida
law regulates the size the container in which beer is sold.
Micro-breweries - craft beers - want to distribute their product in
the 64 ounce size. The "beer lobby" - the large producers of beer and
the distributors - does not want this bill passed.
http://www.orlandosentinel.com/news/blogs/political-pulse/os-beergrowler-bill-sails-through-onceopposed-house-panel-20140211,0,1159675.post
In the past, a "growler" was a container carried to a tavern by a
person, and the tavern would fill the container with beer. Beer
take-out, so to speak.
My father-in-law, in the 1940s, used to send my now-wife to his
favorite Rockford (Illinois) tap (a term for a tavern) with his
growler. His was a tin bucket, but my wife doesn't have any idea of
how many ounces of beer it contained.
No problem, in those days, for a tavern owner to fill the growler
brought in a by child younger than 10 as long as the father was known.
And, her father was known in that tavern. My wife was also sent to
that tavern on Friday afternoons to pick up her father's pay envelope
before he spent the contents, but that errand was designed by her
mother.
"Rushing the growler" was an expression used to describe children
bringing growlers of beer to the workplace for their father's lunch.
Coincidently, my wife was just talking about doing this in a
conversation last week when the "Growler Bill" was written about in
the newspaper. She knew what a "growler" is, but not that it is a
specific size today and that it now describes a glass bottle.
>and (2) does the idiom "rush the growler" survive?
Well, it wouldn't since the practice is now illegal.