When first introduced, the original Rowntree’s Chocolate Crisp bar had a red wrapper.
Which briefly became blue between 1945–1947. As a result of milk shortages after the end of World War II, the milk chocolate coating was suspended and a dark chocolate was used instead during that period.
Since its introduction in the 1970s, the Hershey’s Kit Kat packaging and advertising in the United States differed from the branding used in every other country where it was sold. In 2002, Hershey Kit Kats adopted the slanted ellipse logo used worldwide by Nestlé, though the ellipse was red and the text white. The US version of "Kit Kat Chunky" is known as "Big Kat".
In the United Kingdom, the product has traditionally been wrapped in silver foil and an outer paper band. In 2001, flow wrap plastic was substituted as the confectionery’s packaging