Ogura Akira, Hirata Takakazu, Tanaka Moriya: Preservation container for food or the like. Santoku, Mitsui Kanko Trading, June 20, 2001: EP1108655-A1 (1 worldwide citation)

A preservation container for food and the like comprising a sealable container main body (2), to which a lid (3) is attached, an opening (5) connecting the inside and the outside is provided on the lid (3), and a gas non-permeable sheet (6) having a vent hole (7) at a position offset to the opening ...