Matched Numerical Dispersion for 3D FDTD Plane Wave Injector

A container includes an inner layer portion for liquid, an outer layer having an inner shape substantially equivalent to an outer shape of the inner layer, with the outer layer having an air vent communicating from between the two layers and the ambient, and a dispensing portion. When liquid is dispensed, the inner layer peels off the outer layer. The inner layer and the outer layer are bonded, in a first region, to each other with a force such that the inner layer is peelable from the outer layer by change of pressure, and the inner layer and the outer layer are bonded, in a second region, to each other with a force which is larger than that in the first region, by which the inner layer peels off the outer layer in the second region after the inner layer peels off the outer layer in the first region.