M&M's are "colorful button-shaped chocolates", each of which has the letter "m" printed in lower case on one side, surrounding a filling which varies depending upon the variety of M&M's. The original candy had a milk chocolate filling which, upon introducing other variations, was branded as the "plain" variety. "Peanut" M&M's, which feature a peanut coated in milk chocolate, and finally a candy shell, were the first variation to be introduced, and they remain a regular variety. Numerous other variations have been introduced, some of which are regular widespread varieties while others are limited in duration or geographic availability.
M&M's is the flagship product of the Mars Wrigley Confectionery division of Mars incorporated The candy originated in the United States in 1941, and are sold in over 100 countries, since 2003. More than 400 million individual M&M's are produced every day in the United States.They are produced in different colors, some of which have changed over the years. The candy-coated chocolate concept was inspired by a method used to allow soldiers to carry chocolate in warm climates without having it melt. The company's longest-lasting slogan reflects this: "Melts in your mouth, not in your hand."