A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

Note:
The expression does not correlate in meaning with the
phrase poster man— used of a person who is a (usually positive)
symbol for smth.: He is alive and well; he is the poster man for
what is possible after having a transplant.
sardine box • sardine tin
sardine box —(UK hist.) used of the City & South London
Railway opened in 
1
890, so called because of the packed con-
ditions at rush hour: The passengers in the “sardine box rail-
way” had to sit facing each other on long benches in light too
dim to read a newspaper.
sardine tin —(sl., pejor.) 
1
. a mini-car: Leave that smelly little
sardine tin alone. The exhaust smells a little, but that’s noth-
ing. 2. an aircraft: Just back from our Tenerife family holiday
and will never forget the sardine tin we flew in. 3. (Nautical)
a clumsy steamer: No one was allowed on deck … and in the
never ending rolling sardine tin, we were all tottering about
uphill and downhill. 4. (Nautical) a submarine: U-boat sub-
mariners were true dedicated sailors and so is anyone who gets
inside a sardine tin under water.
satisfied of something • satisfied with something
satisfied of something —completely sure about smth.: Are you
quite satisfied of the truth of his story now?
satisfied with something —entirely pleased with smth.: I am
not satisfied with your work; you must improve it.
save someone from something • save someone
something
save someone from something —deliver or rescue a person from
danger, injury, etc.: I was originally going to write about my
grandparents who saved me from a life of poverty and self-
destruction.
save someone something —make smth. unnecessary; relieve a
person from the need of doing smth.: I said that I would save
him the exertion of turning me out of doors, by going of my
own accord.