Double-walled container

A double-walled container comprising an outer layer body and an inner layer body, the outer layer body including a mouth with an open upper side, a trunk, and a bottom, and the inner layer body including filling space to contain a content medium, being disposed on an inner side of the outer layer body, and being configured to undergo volume reduction and deformation in conjunction with dispensing of the content medium from the filling space, wherein

• a single adhesive strip is disposed between the outer layer body and the inner layer body in a manner such that the adhesive strip extends along a center axis of the outer layer body and couples the outer layer body and the inner layer body partially,
• the outer layer body is provided, in a position that is offset in a circumferential direction with respect to the adhesive strip, with a single ambient air introduction hole through which ambient air is drawn between the outer layer body and the inner layer body, and
• the outer layer body includes an inner surface configured by a separation surface and a pseudo-adhesive surface, the separation surface facing the ambient air introduction hole and being separated from an outer surface of the inner layer body, and the pseudo-adhesive surface facing the separation surface and being separably adhered to the outer surface of the inner layer body.