To indicate the mist suitable time to eat through a change of color without measuring time.

This cup noodle is constructed such that preferably foodstuffs such as dried noodle, dried seasoning materials, ingredients and spice or the like are stored in a foamed plastic container 1. The surface of the formed plastic container 1 is provided with some small holes 3 to be opened there and at the same time a thermo-sensitive member 4 having its color changed for use in closing the small holes 1 is stuck to the container.