Charlie Munger was obsessed with Costco. Here's why the billionaire called himself a 'total addict.'

• The late billionaire investor Charlie Munger loved Costco, and called himself a "total addict."
• He served on the company's board of directors, and owned more than 187,000 shares of Costco stock.
• "I wish everything else in America was working as well as Costco does," Munger said last year.

With the death of billionaire investor Charlie Munger on Tuesday, Costco is losing one of its most ardent fans.

Munger famously declared himself a "total addict" of the company on whose board he served for more than a quarter century.