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Although originally marketed as being otherwise, the current incarnations of Munchos are actually thinner than most potato chips, to the point of being slightly transparent and containing air pockets. When first introduced, they were positioned as "a potato snack, thicker than potato chips." Their slightly curved shape and rough texture assist with dipping. Ingredients include dehydrated potatoes, corn and/or sunflower oil, corn meal, potato starch, salt, sulfate, niacin, thiamin mononitrate, riboflavin, and yeast.
In 1969, a 7.25oz., bag which sold for 59 cents retail is now sold—as of 2014[update]—for $2 to $3.29, and .99 for the 4.25 oz., "Big Grab". The original Munchos debuted a few months after Pringles, another brand of product that identified as "potato crisps" (a term Pringles adopted after Frito-Lay successfully sued to prevent them from naming their product "potato chips"); early descriptions of Munchos closely parallel those of Pringles, with their curved shapes and thicker construction.
An ad campaign in 1969 included the phrase, "It's MUNCHOS!" spoken in a high-pitched voice. The commercials created by Jim Henson featured a spokesman named Fred (performed by Jim Henson) who talked about the Munchos and a monster named Arnold (performed by Jim Henson in one commercial, Frank Oz in later commercials) who craved the Munchos. Arnold's puppet eventually became Cookie Monster on Sesame Street. Fred's puppet later became Zelda Rose on The Muppet Show.