Tetrahedron/pentahedron container

1. A container comprising:

a plurality of adjacent surfaces connected by folds or sealed seams,

at least one of the pluralities of surfaces is formed as a triangular surface having a top portion defined as an angular area;

a sealing portion formed by at least two of the plurality of surfaces adjacent to the triangular surface and the angular area, extending straightly from the angular area; and

an opening structure formed by folding a portion of the angular area of the at least one triangular surface into the container, wherein the opening structure is defined by folding lines, including a horizontal folding line extending across the triangual surface between two adjacent surfaces and a pair of first folding lines ( 8 ) formed between the triangular surface and the respective adjacent surfaces, and the pair of second folding lines ( 7 ) extending along the two respective adjacent surfaces, the pair of first and the pair of second folding lines converge towards the sealing portion when closed.

2. The container of claim 1 , wherein a third folding line is formed on the opening structure, extending perpendicular from the horizontal folding line to the sealing portion so as to enhance an opening/close operation of the opening structure.

3. The container of claim 2 , wherein a pair of fourth folding lines extend from the horizontal folding line to the sealing portion away from pair of second folding lines.

4. The container of claim 1 , wherein an-overlapped the sealing portion is sealed by adhesive.

5. The container of claim 4 , wherein a cutting line is provided at the sealing portion, so that the opening structure can be easily opened.

6. The container of claim 1 , wherein the plurality of adjacent surfaces are connected by folds or sealed seams to form a triangular-tetrahedron body.

7. The container of claim 1 , wherein the plurality of adjacent surfaces are connected by folds or sealed seams to form of a pentahedron body.