Patent ID: 6945428

Claim:
A liquid accommodating container comprising: an inner layer constituting a liquid accommodating portion for accommodating liquid therein; an outer layer having an inner shape substantially equivalent to an outer shape of said inner layer, said outer layer being provided with an air vent for fluid communication between a space between said inner layer and said outer layer with an ambience; a liquid supply portion for supplying the liquid out of the liquid accommodating portion, wherein with supply of the liquid through said liquid supply portion, said inner layer peels off said outer layer, wherein said inner layer and said outer layer are in contact, in a first region, with each other with such a force that said inner layer is peelable from said outer layer by change of an inner pressure, and said inner layer and said outer layer are in contact, in a second region, with each other with a force which is larger than that in said first region, by which said inner layer peels off said outer layer in the second region after said inner layer peels off said outer layer in the first region, and wherein said inner layer is bonded to said outer layer with a first bonding force in the first region and a second bonding force in the second region, the second bonding force being larger than the first bonding force.