Delaminatable laminated bottle

A delaminatable laminated bottle comprising:

• an outer layer bottle having a squeeze-deformable bottomed tubular body, a shoulder portion and a mouth portion connected to an upper edge of the body via the shoulder portion;
• and
• an inner layer bag provided on an inner surface of the outer layer bottle and delaminatable from the outer layer bottle;
• wherein the outer layer bottle has an introduction hole for introducing outside air into a space between the outer layer bottle and the inner layer bag;
• wherein the body of the outer layer bottle has a flat tubular peripheral wall which includes a pair of front and rear wall portions that are either planar or slightly curved and spaced a predetermined distance in opposed relation and left and right wall portions respectively connecting left and right edges of the front wall portion to left and right edges of the rear wall portion, and has an anteroposterior thickness which is smaller than a lateral width thereof,
• wherein the left and right wall portions each have an arcuate shape with an anteroposteriorly middle portion thereof bulged laterally outward,
• wherein the body further has an upper connection portion which connects upper edges of the front and rear wall portions to the shoulder portion, and a lower connection portion which connects lower edges of the front and rear wall portions to a bottom portion thereof,
• wherein the introduction hole is provided in one of the front wall portion and the rear wall portion,
• wherein the introduction hole is adapted to be closed by a finger when the body is squeezed to be deformed by pressing the front and rear wall portions by the finger,
• the front and rear wall portions having a thickness,
• the left and right wall portions having a thickness,
• the thicknesses of the front and rear wall portions and left and right wall portions selected so that:
• a) the front and rear wall portions can be pressed towards each other by squeezing forces applied by fingers of a user without being significantly warped;
• and b) the left and right wall portions are elastically deformable by the squeezing forces applied by the user's fingers to the front and rear walls to allow the front and rear walls to be moved towards each other,
• wherein an average thickness of the left and right wall portions is less than an average thickness of the front and rear wall portions,
• wherein the connection portions have a thickness and an average thickness of the connection portions is less than one half the average thickness of the front and rear wall portions.