The last drop?
At the end of this film you see a sign over an elevator with
the message "Good to the last drop". This is a reference to a real experience
in the life of Michael Maltese. When he decided
that plumbing wasn't the career he wanted, he set off
down the street looking for an opportunity. After wandering awhile
stumbled across a sign
for Terrytoons wanting "in-betweeners" for their animation department.
Maltse had no idea what the job was, but he
rode a rickety elevator up to the 18th floor and interviewed with Paul Terry.
During this he jokingly suggested a slogan for the elevator he had ridden:
"Good to the last drop". Terry was impressed enough to give him a chance and the
rest is history - one of the greatest writers of animated films got started
in the field by random luck, and this line was one example of the wit
he used to land that first job.