M&M's (named after the surnames of Forrest Mars, Sr., and Bruce Murrie of Hershey's[2]) are "colorful button-shaped candies"[1] produced by Mars, Incorporated. The candy shells, each of which has the letter "m" printed in lower case on one side, surround a variety of fillings, including milk chocolate, dark chocolate, crisped rice, mint chocolate, peanuts, almonds, orange chocolate, coconut, pretzel, wild cherry, cinnamon, raspberry, and peanut butter. M&M's originated in the United States in 1941, and are now sold in as many as 100 countries.[1] They are produced in different colors, some of which have changed over the years.
In 1999, Crispy M&M's were released. They were slightly larger than the milk chocolate variety and featured a crispy wafer center. They were discontinued in the United States in 2005. They are still available in Europe, Australia, and Southeast Asia