Gobstoppers, also known as Jawbreakers, are hard pressed candies that have multiple layers, each with a different color and sometimes flavor. They are called Jawbreakers because they are so hard that biting them can cause damage to teeth. However, they are still popular because they last a long time in the mouth. The manufacturing process of Jawbreakers takes several weeks, as liquid sugar is repeatedly added during the panning process. These candies gained popularity after author Roald Dahl referred to them as fictional Everlasting Gobstoppers in his 1964 children's novel, Charlie and the Chocolate Factory.