Rondo was a citrus-flavored soft drink available in limited U.S. markets in the late 1970s and early 1980s, one which was "blended from fine essences", and "lightly carbonated".
It is mostly famous for its slogan - "Rondo---The Thirst Crusher" - as well as its commercials, featuring people crushing the cans in various ways.
Schweppes sells a similar drink in Australia under the name Solo.
[1] The drink and its name were parodied in the 2006 film Idiocracy as "Brawndo: The Thirst Mutilator".
The can design retains much of the original colors and look and feel with some slight changes.