The invention provides edible compositions such as solid particulate sweeteners, boiled sweets, chocolate and chewing gum, wherein the compositions comprise at least 10% on a dry weight basis of one or more substances having an endothermic heat of solution of at least 30 kJkg and at least 10% on a dry weight basis of a substantially amorphous solid trehalose. The first electrode includes: a first conductive layer; and a first polymer film, which covers the first conductive layer and which makes contact with the display medium layer. With this construction, it is possible to restrain characteristic impedances at the exposed portions of the cable cores, which tend to become higher.