Based in Mason, Michigan, Dart is the world's largest manufacturer of foam cups and containers, producing about as many as all competitors combined.

In May 2012, Dart acquired Illinois-based Solo Cup Company and now has approximately 15,000 employees and more than 45 production, distribution center, and office locations in eight countries.

Dart, came out of the University of Michigan with three degrees (metallurgy, mathematics, and engineering), he worked for DuPont briefly, then joined the family business in the late 1950s.

[6] He experimented with and perfected an expandable polystyrene (EPS) molding process, and shipped their first insulated foam cups in April 1960.

In U.S. Tax Court, Dart Container argued the money was a valid business expense due to "specific threats and other facts and circumstances".