A multilayered container (100; 100B; 100C; 100D; 100E; 100F; 100H) comprising: an inner container (55B; 5C) configured to contain a content; and an outer container (7; 7B; 7C;7H) configured to accommodate the inner container, wherein the inner container (55B; 5C) has a side surface formed with a plurality of folded pleats contractable and expandable in a vertical direction, so that the inner container (5; 5B; 5C) is shrinkable along the plurality of folded pleats inside the outer container (7; 7B; 7C), wherein the inner container (55B; 5C) includes a metal layer or an inorganic layer, wherein a discharge mechanism (50; 60; 60F; 60H), configured to discharge the content, and including a mechanism configured to prevent air from entering the inner container when discharging the content, is attached to an upper surface of the inner container (5; 5B; 5C), wherein the side surface of the inner container (55B, 5C) includes folded pleats formed by each side of parallelograms, and folded pleats formed by diagonal lines of the parallelograms, and wherein the folded pleats form a plurality of units (S1, S2) that are stacked in the vertical direction, so that vertically adjacent units share (S1, S2) a top side and a bottom side of adjacent parallelograms, wherein in a plurality of units (S1, S2) formed by the folded pleats of the inner container, mountain-fold creases (11, 13, 15) or valley-fold creases (14, 16) of the folded pleats are formed by each side of parallelograms, and diagonal lines of the parallelograms, and as an amount of the content in the inner container decreases, the inner container is configured to be folded in the vertical direction and to shrink so that the mountain-fold creases (11, 13, 15) protrude outward and the valley-fold creases (14, 16) fold inward and collapse, to maintain a shrunk state, and wherein the side surface is vertically symmetrical for each of the plurality of units (S1, S2), such that the side surface is configured to be vertically crushed without changing the positions of upper and lower ends thereof as the inner container shrinks. an inner container (55B; 5C) configured to contain a content; and an outer container (7; 7B; 7C;7H) configured to accommodate the inner container, wherein the inner container (55B; 5C) has a side surface formed with a plurality of folded pleats contractable and expandable in a vertical direction, so that the inner container (5; 5B; 5C) is shrinkable along the plurality of folded pleats inside the outer container (7; 7B; 7C), wherein the inner container (55B; 5C) includes a metal layer or an inorganic layer, wherein a discharge mechanism (50; 60; 60F; 60H), configured to discharge the content, and including a mechanism configured to prevent air from entering the inner container when discharging the content, is attached to an upper surface of the inner container (5; 5B; 5C), wherein the side surface of the inner container (55B, 5C) includes folded pleats formed by each side of parallelograms, and folded pleats formed by diagonal lines of the parallelograms, and wherein the folded pleats form a plurality of units (S1, S2) that are stacked in the vertical direction, so that vertically adjacent units share (S1, S2) a top side and a bottom side of adjacent parallelograms, wherein in a plurality of units (S1, S2) formed by the folded pleats of the inner container, mountain-fold creases (11, 13, 15) or valley-fold creases (14, 16) of the folded pleats are formed by each side of parallelograms, and diagonal lines of the parallelograms, and as an amount of the content in the inner container decreases, the inner container is configured to be folded in the vertical direction and to shrink so that the mountain-fold creases (11, 13, 15) protrude outward and the valley-fold creases (14, 16) fold inward and collapse, to maintain a shrunk state, and wherein the side surface is vertically symmetrical for each of the plurality of units (S1, S2), such that the side surface is configured to be vertically crushed without changing the positions of upper and lower ends thereof as the inner container shrinks.