PURPOSE: A new composition and the method are provided to manufacture a container which can be sealed, making liquid tight, with pressure-proof property and a thin wall. CONSTITUTION: The sealable container which has a liquid sealing barrier contains: a mineral filling matrix molded from mineral filling mixture that is water; an organic polymer binder selected from a polysaccharide, a protein, or mixture and inducer of those matter; a mineral condensing body occupies 20-90% of a solid inside the mixture; and a fiber material. The fiber material disperses regularly to the mineral filled matrix and has an organic element that occupies 5wt% of the solid inside the mineral filled matrix. Also the mineral filled matrix is less that 1cm thickness.