Gobstoppers usually consist of several layers, each layer dissolving to reveal a different coloured (and sometimes different flavoured) layer, before dissolving completely. Gobstoppers are sucked, being too hard to chew comfortably.Gobstoppers have been sold in traditional sweet shops for several decades, often sold by weight from jars. As gobstoppers dissolve very slowly, they last a very long time in the mouth, which is a major factor in their enduring popularity with children.
