A non-equal length open-identification container, comprising: a cover , one side of a top surface thereof extended with an elastic sheet having a predetermined extension length, and an end thereof having a first coupling element facing down; a box , one side of a top surface thereof horizontally extended with a flange having a notch , said flange projected with a stopping portion , and said cover adapted to be in combination with a top portion of said box , allowing a bottom surface of said sheet to be in contact with a top surface of said stopping portion ; and a second coupling element , having a groove and in combination with said notch with a dotted broken line (A wherein a bottom surface of said cover is surrounded with a sealing wall ; an inner wall of said box is configured with a first step portion ; and wherein a bottom surface of said sealing wall is in contact with said first step portion after said cover is in combination with said box , characterized in that the inner wall of said box is configured with a second step portion ; and said first coupling element is offset from said groove such that after said cover is in combination with said box , a top surface of said sealing wall is flush with said second step portion , wherein said sheet is depressible down to allow said first coupling element to be in engagement with said groove , and wherein said second coupling element is still in combination with said first coupling element after said second coupling element is torn away along the dotted broken line (A) and said sheet is recovered due to the elasticity thereof after said second coupling element is torn away along said dotted broken line (A), allowing said second coupling element to be positioned above said notch to form a difference in level and thus not in engagement with said notch and said sheet be pushed outside said notch . a cover , one side of a top surface thereof extended with an elastic sheet having a predetermined extension length, and an end thereof having a first coupling element facing down; a box , one side of a top surface thereof horizontally extended with a flange having a notch , said flange projected with a stopping portion , and said cover adapted to be in combination with a top portion of said box , allowing a bottom surface of said sheet to be in contact with a top surface of said stopping portion ; and a second coupling element , having a groove and in combination with said notch with a dotted broken line (A wherein a bottom surface of said cover is surrounded with a sealing wall ; an inner wall of said box is configured with a first step portion ; and wherein a bottom surface of said sealing wall is in contact with said first step portion after said cover is in combination with said box , characterized in that the inner wall of said box is configured with a second step portion ; and said first coupling element is offset from said groove such that after said cover is in combination with said box , a top surface of said sealing wall is flush with said second step portion , wherein said sheet is depressible down to allow said first coupling element to be in engagement with said groove , and wherein said second coupling element is still in combination with said first coupling element after said second coupling element is torn away along the dotted broken line (A) and said sheet is recovered due to the elasticity thereof after said second coupling element is torn away along said dotted broken line (A), allowing said second coupling element to be positioned above said notch to form a difference in level and thus not in engagement with said notch and said sheet be pushed outside said notch . <EOS>