and outside double container in which the bottom plates are identical the inner container has sidewalls and the upper portion is opened wherein the outer container has no sidewall the outer container has an outer shell portion by hardening of a resin itself fig1 e a double container composed of separate inside and outside containers in which the bottom plates are different sidewalls are provided and the upper portions are opened wherein the bottom portion of the inner container is adhered to the bottom portion of the outer container fig1 f a double container composed of separate inside and outside containers in which the bottom plates are different sidewalls are provided and the upper portion is opened wherein the bottom portion of the inner container is to the bottom portion of the outer container a lid is provided on the outer container fig1 g a double container composed of separate inside and outside containers in which the bottom plates are different sidewalls are provided and the upper portion is opened wherein the bottom portion of the inner container is adhered to the bottom portion of the outer container a lid is provided on the inner container fig1 h an inside and outside double container in which the bottom plates are different the inner container has sidewalls and the upper portion is opened wherein the outer container has no sidewall the bottom portion of the outer container is stuck to the bottom portion of the outer container the outer container has an outer shell portion by hardening of a resin itself fig1 although other forms can be considered exemplification is.