DOUBLE-WALLED CONTAINER

摘要

Double container (1) includes: inner layer body (4) provided with upper opening (4b); outer layer body (5) accommodating inner layer body (4) and including mouth portion (5a) provided with aperture (6); and dispensing cap (3) provided with content dispensing spout (9) and fitted to mouth portion (5a). Double container (1) further includes: inside plug (12) provided with dispensing passage (16) and fitted to upper opening (4b); and check valve (21A) configured to open and close dispensing passage (16). Dispensing cap (3) has a cylindrical wall (7), and cylindrical wall (7) has a lower end portion fitted to an outer circumferential surface of outer layer body (5) to provide vent region (32, 33) inside dispensing cap (3). Throttle passage (35) is provided in a passage extending from ambient air introducing hole (31) through vent region (32, 33) to aperture (6).