Container intended for liquid and having a pressure adjustment surface for constant discharge

A container intended for liquid and having a structure in which a side surface of the container is manually pressurized to discharge a content filled in an inner space thereof, the container comprising:

• a container body in which the content is filled, the container body having a structure in which front and back surfaces have areas wider than that of the side surface;
• a lid positioned at or near an upper portion of the container body;
• a discharge hole defined in the lid, the discharge hole comprising a check valve opened and closed by a predetermined pressure;
• and
• a cover for protecting the discharge hole disposed on the lid in which the discharge hole is defined,
• wherein at least one pressure adjustment surface protrudes inward from a first side surface of the container body, and an inner surface of the at least one pressure adjustment surface, facing the inner space of the container body, is spaced a predetermined distance apart from a second side surface disposed opposite with respect to the first side surface, and further wherein
• the at least one pressure adjustment surface is formed of a first softer material having a property different from that of a second harder material for forming other side surfaces of the container body,
• the first softer material of the at least one pressure adjustment surface is softer than that of the second harder material of the other side surfaces and, at a largest perimeter of the at least one pressure adjustment surface, the first softer material of the at least one pressure adjustment surface is surrounded by the second harder material of the other side surfaces, and
• the inner surface of the at least one pressure adjustment, facing the inner space of the container body, has a structure in which, when a force is applied to the first side surface, the inner surface of the at least one pressure adjustment surface contacts an inner wall of the side surface opposite thereto, to prevent the first side surface from being further pressurized.

A container intended for liquid and having a structure in which a side surface of the container is manually pressurized to discharge a content filled in an inner space thereof, the container comprising:

• a container body in which the content is filled, the container body having a structure in which front and back surfaces have areas wider than that of the side surface;
• a lid positioned at or near an upper portion of the container body;
• a discharge hole defined in the lid, the discharge hole comprising a check valve opened and closed by a predetermined pressure;
• and
• a cover for protecting the discharge hole is disposed on the lid in which the discharge hole is defined,
• wherein pressure adjustment surfaces protrude inward from both front and back surfaces of the container body, inner surfaces of the pressure adjustment surfaces face each other and are spaced a predetermined distance apart from each other, and further wherein
• the pressure adjustment surfaces are formed of a first softer material having a property different from that of a second harder material for forming the side surface of the container body,
• the first softer material of the pressure adjustment surfaces is softer than that of the second harder material of the other side surfaces and, at a largest perimeter of the at least one pressure adjustment surface, the first softer material of the at least one pressure adjustment surface is surrounded by the second harder material of the other side surfaces, and
• the inner surfaces of the pressure adjustment surfaces, facing the inner space of the container, have a structure in which, when a force is applied to the side surface, the inner surfaces of the pressure adjustment surfaces contact each other to prevent the side surface from being further pressurized.